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32 vulnerabilities by GitroomHQ
CVE-2026-94456 (GCVE-0-2026-94456)
Vulnerability from nvd – Published: 2026-09-22 16:11 – Updated: 2026-09-22 18:11
VLAI
EPSS
VEX
Title
Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys
Summary
Postiz generates security-sensitive credentials using `Math.random()` instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s deterministic xorshift128+ PRNG state.
An unauthenticated OAuth dynamic client registration endpoint exposes freshly generated client credentials, giving attackers enough consecutive PRNG output to reconstruct that internal state. Once recovered, they can deterministically derive past and future values produced by the same generator, potentially compromising credentials belonging to other users and organizations.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:10 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app | product |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://github.com/gitroomhq/postiz-app/commit/92… | patch |
| https://gadvisory.org/advisories/PSA-2026-TD98KY | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitroomHQ | postiz-app |
Affected:
0 , < 2.4.0
(semver)
|
Date Public
2026-09-22 14:17
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"value": "Postiz generates security-sensitive credentials using `Math.random()` instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8\u2019s deterministic xorshift128+ PRNG state.\n\nAn unauthenticated OAuth dynamic client registration endpoint exposes freshly generated client credentials, giving attackers enough consecutive PRNG output to reconstruct that internal state. Once recovered, they can deterministically derive past and future values produced by the same generator, potentially compromising credentials belonging to other users and organizations."
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"value": "An unauthenticated attacker who predicts an OAuth access token minted for another organization is authenticated as that organization with SUPERADMIN rights over the public API, giving full read and write access to its scheduled posts, connected social accounts, media and team membership."
}
]
},
{
"capecId": "CAPEC-59",
"descriptions": [
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"lang": "en",
"value": "The per-organization API key generated at registration is drawn from the same generator and is honoured by the same middleware with the same SUPERADMIN grant, so an attacker sampling the generator around a signup can predict the API key of a newly created organization."
}
]
},
{
"descriptions": [
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"lang": "en",
"value": "OAuth client secrets, including those returned by anonymous dynamic client registration and by secret rotation, are predictable, allowing an attacker to impersonate a registered OAuth or MCP client to the token endpoint."
}
]
},
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"descriptions": [
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},
{
"lang": "en",
"value": "Once running a release with a corrected generator, treat every credential issued by an affected version as compromised and replace it. That covers organization API keys, OAuth application client secrets, and any outstanding OAuth access tokens and authorizations. Outstanding authorization codes are short-lived and expire on their own."
},
{
"lang": "en",
"value": "Operators who connected social accounts while running an affected version should review those connections, since the PKCE verifiers used to establish them were drawn from the same generator."
}
],
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"time": "2026-09-21T13:34:00.000Z",
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"time": "2026-09-21T20:15:00.000Z",
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"lang": "en",
"time": "2026-09-22T04:32:00.000Z",
"value": "Postiz has developed and verified the patch."
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"time": "2026-09-22T14:17:00.000Z",
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CVE-2026-94455 (GCVE-0-2026-94455)
Vulnerability from nvd – Published: 2026-09-22 16:17 – Updated: 2026-09-22 18:14
VLAI
EPSS
VEX
Title
Unauthenticated /enterprise/create-user mints lifetime top-tier organizations and discloses their API key
Summary
An HTTP endpoint intended for provisioning enterprise and reseller organisations is reachable without any session. The authentication middleware is bound only to an explicit list of controllers, and the enterprise controller is not on that list, so no authentication runs for these routes.
The endpoint's only check is that the request body carries a token bearing a valid signature from the instance secret. It does not check what that token was issued for. Login tokens are signed with the same secret and carry no purpose, audience or expiry claim, so an ordinary user's own session token satisfies the check.
Presented with such a token, the endpoint creates a new organisation holding the highest subscription tier, flagged as lifetime and with a channel allowance far above any sold plan, creates an organisation-owner account alongside it, and returns the new organisation's API key in the response body. That key is immediately valid against the public API.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:13 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app | product |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://github.com/gitroomhq/postiz-app/commit/92… | patch |
| https://gadvisory.org/advisories/PSA-2026-P8W1J0 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitroomHQ | postiz-app |
Affected:
0 , < 2.4.0
(semver)
|
Date Public
2026-09-22 14:36
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"value": "You are not meaningfully affected if you run a default self-hosted instance with no Stripe configuration. In that mode Postiz does not enforce subscription entitlements at all, so an organisation created through this endpoint holds no privileges your users do not already have."
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},
{
"descriptions": [
{
"lang": "en",
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}
]
},
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"descriptions": [
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CVE-2026-19264 (GCVE-0-2026-19264)
Vulnerability from nvd – Published: 2026-08-07 14:15 – Updated: 2026-08-24 11:15
VLAI
EPSS
VEX
Title
Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover
Summary
Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 17:54 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/commit/7936062 | patch |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://gadvisory.org/advisories/PSA-2026-TH12B7 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
0 , < 2.22.1
(custom)
|
Date Public
2026-08-07 14:14
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CVE-2026-19127 (GCVE-0-2026-19127)
Vulnerability from nvd – Published: 2026-08-06 17:02 – Updated: 2026-08-07 14:03
VLAI
EPSS
VEX
Title
Insufficient verification of lifetime-deal redemption codes allows forgery of permanent paid subscriptions
Summary
An issue in the billing and license activation subsystem allows remote attackers to bypass payment authorization workflows. By exploiting insufficient cryptographic validation or lack of server-side state verification on promotional/lifetime-deal (LTD) redemption codes, an unauthenticated attacker can forge valid redemption tokens or replay existing single-use codes to activate permanent, tier-highest paid subscriptions without a financial transaction.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 14:02 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/commit/38… | patch |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://gadvisory.org/advisories/PSA-2026-NWZN9J | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitroomHQ | postiz-app |
Affected:
0 , < 2.21.10
(semver)
|
Date Public
2026-06-22 13:46
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CVE-2026-48799 (GCVE-0-2026-48799)
Vulnerability from nvd – Published: 2026-07-15 16:11 – Updated: 2026-07-15 18:01
VLAI
EPSS
VEX
Title
Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook
Summary
Postiz is an AI social media scheduling tool. Prior to 2.21.8, Postiz fails to verify Nowpayments IPN callback authenticity against the payment provider shared secret and reads the target subscription identifier from the untrusted request body, allowing a low-privileged account to grant arbitrary organizations lifetime PRO subscriptions without payment. This issue is fixed in version 2.21.8.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 18:01 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/23… | x_refsource_MISC |
| https://gadvisory.org/advisories/PSA-2026-Q3TCPK | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.8
|
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CVE-2026-48783 (GCVE-0-2026-48783)
Vulnerability from nvd – Published: 2026-06-16 21:38 – Updated: 2026-06-17 12:43
VLAI
EPSS
VEX
Title
Postiz has an unauthenticated billing-enforcement bypass via /public/modify-subscription
Summary
Postiz is an AI social media scheduling tool. Versions prior to 2.21.8 contained an unauthenticated endpoint that accepted a signed token and applied subscription-enforcement side effects to the organization referenced in that token's claims, without verifying the token's intended purpose. The endpoint, /public/modify-subscription, could not change the persisted subscription tier, but it did execute enforcement-related side effects on the caller's own organization, including adjusting team-member enablement state, disabling integrations exceeding the asserted plan's limits, and resetting the scheduled-post cron when the asserted plan was the free tier. Impact is limited to the attacker's own organization and cannot be redirected at other tenants through this endpoint. This issue has been fixed in version 2.21.8.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 12:43 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/23… | x_refsource_MISC |
| https://gadvisory.org/advisories/PSA-2026-WWFR8X | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.8
|
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CVE-2026-48781 (GCVE-0-2026-48781)
Vulnerability from nvd – Published: 2026-06-16 21:31 – Updated: 2026-06-18 14:26
VLAI
EPSS
VEX
Title
Postiz has cross-tenant SUPERADMIN takeover via Skool-provider JWT forgery
Summary
Postiz is an AI social media scheduling tool. In versions prior to 2.21.8, the Skool integration callback signed an attacker-controlled JSON blob into a session-shape JWT using the application's JWT_SECRET, and the auth middleware trusted every claim in that JWT without re-resolving the user from the database. Any authenticated Postiz user could forge a SUPERADMIN session and impersonate arbitrary organizations. This allowed Full Access to the following: all parts of Postiz, including users registered to the specific instance and the ability to post in the name of the victim's social media channels added to that Postiz instance. This issue has been fixed in version 2.21.8.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 14:25 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/23… | x_refsource_MISC |
| https://gadvisory.org/advisories/PSA-2026-2CAQ96 | x_refsource_MISC |
| http://github.com/gitroomhq/postiz-app/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.8
|
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CVE-2026-42556 (GCVE-0-2026-42556)
Vulnerability from nvd – Published: 2026-05-08 22:28 – Updated: 2026-05-13 17:46
VLAI
EPSS
VEX
Title
Postiz stored XSS in public preview page
Summary
Postiz is an AI social media scheduling tool. From version 2.21.6 to before version 2.21.7, any authenticated user who can create a post can store arbitrary HTML in post content by tampering their own save request and send the public preview link /p/<postId>?share=true to another user. The preview page renders that stored HTML with dangerouslySetInnerHTML on the main application origin. This issue has been patched in version 2.21.7.
Severity
8.9 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 17:24 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
>= 2.21.6, < 2.21.7
|
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CVE-2026-42346 (GCVE-0-2026-42346)
Vulnerability from nvd – Published: 2026-05-08 22:26 – Updated: 2026-05-11 14:35
VLAI
EPSS
VEX
Title
Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validation paths
Summary
Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU (Time-of-Check-Time-of-Use) vulnerability: isSafePublicHttpsUrl() resolves DNS to validate the target IP, but subsequent fetch() calls resolve DNS independently. An attacker controlling a DNS server can exploit this gap via DNS rebinding to redirect requests to internal network addresses. This issue has been patched in version 2.21.7.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 14:35 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/07… | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
>= 2.16.6, < 2.21.7
|
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CVE-2026-42298 (GCVE-0-2026-42298)
Vulnerability from nvd – Published: 2026-05-08 22:24 – Updated: 2026-05-11 18:02
VLAI
EPSS
VEX
Title
Postiz: Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.dev
Summary
Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow (.github/workflows/pr-docker-build.yml) allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a highly privileged GITHUB_TOKEN (write-all permissions). This can be achieved simply by opening a Pull Request from a fork with a maliciously modified Dockerfile.dev. This issue has been patched via commit da44801.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 17:58 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/da… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< da448012dd87e94944cbe83a38e7fd023269ec46
|
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},
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}
},
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}
CVE-2026-40487 (GCVE-0-2026-40487)
Vulnerability from nvd – Published: 2026-04-18 01:19 – Updated: 2026-04-20 15:25
VLAI
EPSS
VEX
Title
Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the `Content-Type` header. The uploaded files are then served by nginx with a Content-Type derived from their original extension (`text/html`, `image/svg+xml`), enabling Stored Cross-Site Scripting (XSS) in the context of the application's origin. This can lead to session riding, account takeover, and full compromise of other users' accounts. Version 2.21.6 contains a fix.
Severity
8.9 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-20 15:25 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.6
|
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CVE-2026-40168 (GCVE-0-2026-40168)
Vulnerability from nvd – Published: 2026-04-10 19:20 – Updated: 2026-04-13 20:55
VLAI
EPSS
VEX
Title
Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream
Summary
Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 20:55 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/30… | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.5
|
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CVE-2026-34590 (GCVE-0-2026-34590)
Vulnerability from nvd – Published: 2026-04-02 17:26 – Updated: 2026-04-03 15:49
VLAI
EPSS
VEX
Title
Postiz: SSRF via Webhook Creation Endpoint Missing URL Safety Validation
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.4, the POST /webhooks/ endpoint for creating webhooks uses WebhooksDto which validates the url field with only @IsUrl() (format check), missing the @IsSafeWebhookUrl validator that blocks internal/private network addresses. The update (PUT /webhooks/) and test (POST /webhooks/send) endpoints correctly apply @IsSafeWebhookUrl. When a post is published, the orchestrator fetches the stored webhook URL without runtime validation, enabling blind SSRF against internal services. This issue has been patched in version 2.21.4.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 15:49 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/5a… | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.4
|
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CVE-2026-34577 (GCVE-0-2026-34577)
Vulnerability from nvd – Published: 2026-04-02 17:24 – Updated: 2026-04-03 15:52
VLAI
EPSS
VEX
Title
Postiz: Unauthenticated Full-Read SSRF via /public/stream Endpoint with Trivially Bypassable Extension Check
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.3, the GET /public/stream endpoint in PublicController accepts a user-supplied url query parameter and proxies the full HTTP response back to the caller. The only validation is url.endsWith('mp4'), which is trivially bypassable by appending .mp4 as a query parameter value or URL fragment. The endpoint requires no authentication and has no SSRF protections, allowing an unauthenticated attacker to read responses from internal services, cloud metadata endpoints, and other network-internal resources. This issue has been patched in version 2.21.3.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 15:52 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.3
|
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CVE-2026-34576 (GCVE-0-2026-34576)
Vulnerability from nvd – Published: 2026-04-02 17:23 – Updated: 2026-04-02 18:57
VLAI
EPSS
VEX
Title
Postiz: SSRF in upload-from-url endpoint allows fetching internal resources and cloud metadata
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.3, the POST /public/v1/upload-from-url endpoint accepts a user-supplied URL and fetches it server-side using axios.get() with no SSRF protections. The only validation is a file extension check (.png, .jpg, etc.) which is trivially bypassed by appending an image extension to any URL path. An authenticated API user can fetch internal network resources, cloud instance metadata, and other internal services, with the response data uploaded to storage and returned to the attacker. This issue has been patched in version 2.21.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:57 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.3
|
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"value": "Postiz is an AI social media scheduling tool. Prior to version 2.21.3, the POST /public/v1/upload-from-url endpoint accepts a user-supplied URL and fetches it server-side using axios.get() with no SSRF protections. The only validation is a file extension check (.png, .jpg, etc.) which is trivially bypassed by appending an image extension to any URL path. An authenticated API user can fetch internal network resources, cloud instance metadata, and other internal services, with the response data uploaded to storage and returned to the attacker. This issue has been patched in version 2.21.3."
}
],
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CVE-2026-94455 (GCVE-0-2026-94455)
Vulnerability from cvelistv5 – Published: 2026-09-22 16:17 – Updated: 2026-09-22 18:14
VLAI
EPSS
VEX
Title
Unauthenticated /enterprise/create-user mints lifetime top-tier organizations and discloses their API key
Summary
An HTTP endpoint intended for provisioning enterprise and reseller organisations is reachable without any session. The authentication middleware is bound only to an explicit list of controllers, and the enterprise controller is not on that list, so no authentication runs for these routes.
The endpoint's only check is that the request body carries a token bearing a valid signature from the instance secret. It does not check what that token was issued for. Login tokens are signed with the same secret and carry no purpose, audience or expiry claim, so an ordinary user's own session token satisfies the check.
Presented with such a token, the endpoint creates a new organisation holding the highest subscription tier, flagged as lifetime and with a channel allowance far above any sold plan, creates an organisation-owner account alongside it, and returns the new organisation's API key in the response body. That key is immediately valid against the public API.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:13 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app | product |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://github.com/gitroomhq/postiz-app/commit/92… | patch |
| https://gadvisory.org/advisories/PSA-2026-P8W1J0 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitroomHQ | postiz-app |
Affected:
0 , < 2.4.0
(semver)
|
Date Public
2026-09-22 14:36
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{
"descriptions": [
{
"lang": "en",
"value": "Recurring unmetered resource consumption. The per-organisation AI allowance (500 image generations, 60 video generations, 600 clipping minutes) refills on a rolling monthly window, and the lifetime flag exempts the organisation from subscription reconciliation, so each provisioned organisation is an indefinite draw on the operator\u0027s model and GPU budget rather than a one-off."
}
]
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"descriptions": [
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}
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CVE-2026-94456 (GCVE-0-2026-94456)
Vulnerability from cvelistv5 – Published: 2026-09-22 16:11 – Updated: 2026-09-22 18:11
VLAI
EPSS
VEX
Title
Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys
Summary
Postiz generates security-sensitive credentials using `Math.random()` instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s deterministic xorshift128+ PRNG state.
An unauthenticated OAuth dynamic client registration endpoint exposes freshly generated client credentials, giving attackers enough consecutive PRNG output to reconstruct that internal state. Once recovered, they can deterministically derive past and future values produced by the same generator, potentially compromising credentials belonging to other users and organizations.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:10 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app | product |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://github.com/gitroomhq/postiz-app/commit/92… | patch |
| https://gadvisory.org/advisories/PSA-2026-TD98KY | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitroomHQ | postiz-app |
Affected:
0 , < 2.4.0
(semver)
|
Date Public
2026-09-22 14:17
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}
]
},
{
"capecId": "CAPEC-59",
"descriptions": [
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"lang": "en",
"value": "The per-organization API key generated at registration is drawn from the same generator and is honoured by the same middleware with the same SUPERADMIN grant, so an attacker sampling the generator around a signup can predict the API key of a newly created organization."
}
]
},
{
"descriptions": [
{
"lang": "en",
"value": "OAuth client secrets, including those returned by anonymous dynamic client registration and by secret rotation, are predictable, allowing an attacker to impersonate a registered OAuth or MCP client to the token endpoint."
}
]
},
{
"descriptions": [
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"lang": "en",
"value": "Authorization codes issued at the consent step are predictable, exposing in-flight OAuth authorization flows to interception and redemption by a third party."
}
]
},
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"descriptions": [
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"lang": "en",
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},
{
"lang": "en",
"value": "Once running a release with a corrected generator, treat every credential issued by an affected version as compromised and replace it. That covers organization API keys, OAuth application client secrets, and any outstanding OAuth access tokens and authorizations. Outstanding authorization codes are short-lived and expire on their own."
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"lang": "en",
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CVE-2026-19264 (GCVE-0-2026-19264)
Vulnerability from cvelistv5 – Published: 2026-08-07 14:15 – Updated: 2026-08-24 11:15
VLAI
EPSS
VEX
Title
Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover
Summary
Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 17:54 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/commit/7936062 | patch |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://gadvisory.org/advisories/PSA-2026-TH12B7 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
0 , < 2.22.1
(custom)
|
Date Public
2026-08-07 14:14
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CVE-2026-19127 (GCVE-0-2026-19127)
Vulnerability from cvelistv5 – Published: 2026-08-06 17:02 – Updated: 2026-08-07 14:03
VLAI
EPSS
VEX
Title
Insufficient verification of lifetime-deal redemption codes allows forgery of permanent paid subscriptions
Summary
An issue in the billing and license activation subsystem allows remote attackers to bypass payment authorization workflows. By exploiting insufficient cryptographic validation or lack of server-side state verification on promotional/lifetime-deal (LTD) redemption codes, an unauthenticated attacker can forge valid redemption tokens or replay existing single-use codes to activate permanent, tier-highest paid subscriptions without a financial transaction.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 14:02 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/commit/38… | patch |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://gadvisory.org/advisories/PSA-2026-NWZN9J | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitroomHQ | postiz-app |
Affected:
0 , < 2.21.10
(semver)
|
Date Public
2026-06-22 13:46
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CVE-2026-48799 (GCVE-0-2026-48799)
Vulnerability from cvelistv5 – Published: 2026-07-15 16:11 – Updated: 2026-07-15 18:01
VLAI
EPSS
VEX
Title
Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook
Summary
Postiz is an AI social media scheduling tool. Prior to 2.21.8, Postiz fails to verify Nowpayments IPN callback authenticity against the payment provider shared secret and reads the target subscription identifier from the untrusted request body, allowing a low-privileged account to grant arbitrary organizations lifetime PRO subscriptions without payment. This issue is fixed in version 2.21.8.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 18:01 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/23… | x_refsource_MISC |
| https://gadvisory.org/advisories/PSA-2026-Q3TCPK | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.8
|
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CVE-2026-48783 (GCVE-0-2026-48783)
Vulnerability from cvelistv5 – Published: 2026-06-16 21:38 – Updated: 2026-06-17 12:43
VLAI
EPSS
VEX
Title
Postiz has an unauthenticated billing-enforcement bypass via /public/modify-subscription
Summary
Postiz is an AI social media scheduling tool. Versions prior to 2.21.8 contained an unauthenticated endpoint that accepted a signed token and applied subscription-enforcement side effects to the organization referenced in that token's claims, without verifying the token's intended purpose. The endpoint, /public/modify-subscription, could not change the persisted subscription tier, but it did execute enforcement-related side effects on the caller's own organization, including adjusting team-member enablement state, disabling integrations exceeding the asserted plan's limits, and resetting the scheduled-post cron when the asserted plan was the free tier. Impact is limited to the attacker's own organization and cannot be redirected at other tenants through this endpoint. This issue has been fixed in version 2.21.8.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 12:43 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/23… | x_refsource_MISC |
| https://gadvisory.org/advisories/PSA-2026-WWFR8X | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.8
|
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CVE-2026-48781 (GCVE-0-2026-48781)
Vulnerability from cvelistv5 – Published: 2026-06-16 21:31 – Updated: 2026-06-18 14:26
VLAI
EPSS
VEX
Title
Postiz has cross-tenant SUPERADMIN takeover via Skool-provider JWT forgery
Summary
Postiz is an AI social media scheduling tool. In versions prior to 2.21.8, the Skool integration callback signed an attacker-controlled JSON blob into a session-shape JWT using the application's JWT_SECRET, and the auth middleware trusted every claim in that JWT without re-resolving the user from the database. Any authenticated Postiz user could forge a SUPERADMIN session and impersonate arbitrary organizations. This allowed Full Access to the following: all parts of Postiz, including users registered to the specific instance and the ability to post in the name of the victim's social media channels added to that Postiz instance. This issue has been fixed in version 2.21.8.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 14:25 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/23… | x_refsource_MISC |
| https://gadvisory.org/advisories/PSA-2026-2CAQ96 | x_refsource_MISC |
| http://github.com/gitroomhq/postiz-app/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.8
|
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CVE-2026-42556 (GCVE-0-2026-42556)
Vulnerability from cvelistv5 – Published: 2026-05-08 22:28 – Updated: 2026-05-13 17:46
VLAI
EPSS
VEX
Title
Postiz stored XSS in public preview page
Summary
Postiz is an AI social media scheduling tool. From version 2.21.6 to before version 2.21.7, any authenticated user who can create a post can store arbitrary HTML in post content by tampering their own save request and send the public preview link /p/<postId>?share=true to another user. The preview page renders that stored HTML with dangerouslySetInnerHTML on the main application origin. This issue has been patched in version 2.21.7.
Severity
8.9 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 17:24 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
>= 2.21.6, < 2.21.7
|
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CVE-2026-42346 (GCVE-0-2026-42346)
Vulnerability from cvelistv5 – Published: 2026-05-08 22:26 – Updated: 2026-05-11 14:35
VLAI
EPSS
VEX
Title
Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validation paths
Summary
Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU (Time-of-Check-Time-of-Use) vulnerability: isSafePublicHttpsUrl() resolves DNS to validate the target IP, but subsequent fetch() calls resolve DNS independently. An attacker controlling a DNS server can exploit this gap via DNS rebinding to redirect requests to internal network addresses. This issue has been patched in version 2.21.7.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 14:35 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/07… | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
>= 2.16.6, < 2.21.7
|
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CVE-2026-42298 (GCVE-0-2026-42298)
Vulnerability from cvelistv5 – Published: 2026-05-08 22:24 – Updated: 2026-05-11 18:02
VLAI
EPSS
VEX
Title
Postiz: Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.dev
Summary
Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow (.github/workflows/pr-docker-build.yml) allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a highly privileged GITHUB_TOKEN (write-all permissions). This can be achieved simply by opening a Pull Request from a fork with a maliciously modified Dockerfile.dev. This issue has been patched via commit da44801.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 17:58 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/da… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< da448012dd87e94944cbe83a38e7fd023269ec46
|
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CVE-2026-40487 (GCVE-0-2026-40487)
Vulnerability from cvelistv5 – Published: 2026-04-18 01:19 – Updated: 2026-04-20 15:25
VLAI
EPSS
VEX
Title
Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the `Content-Type` header. The uploaded files are then served by nginx with a Content-Type derived from their original extension (`text/html`, `image/svg+xml`), enabling Stored Cross-Site Scripting (XSS) in the context of the application's origin. This can lead to session riding, account takeover, and full compromise of other users' accounts. Version 2.21.6 contains a fix.
Severity
8.9 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-20 15:25 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.6
|
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CVE-2026-40168 (GCVE-0-2026-40168)
Vulnerability from cvelistv5 – Published: 2026-04-10 19:20 – Updated: 2026-04-13 20:55
VLAI
EPSS
VEX
Title
Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream
Summary
Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 20:55 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/30… | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.5
|
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CVE-2026-34590 (GCVE-0-2026-34590)
Vulnerability from cvelistv5 – Published: 2026-04-02 17:26 – Updated: 2026-04-03 15:49
VLAI
EPSS
VEX
Title
Postiz: SSRF via Webhook Creation Endpoint Missing URL Safety Validation
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.4, the POST /webhooks/ endpoint for creating webhooks uses WebhooksDto which validates the url field with only @IsUrl() (format check), missing the @IsSafeWebhookUrl validator that blocks internal/private network addresses. The update (PUT /webhooks/) and test (POST /webhooks/send) endpoints correctly apply @IsSafeWebhookUrl. When a post is published, the orchestrator fetches the stored webhook URL without runtime validation, enabling blind SSRF against internal services. This issue has been patched in version 2.21.4.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 15:49 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/commit/5a… | x_refsource_MISC |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.4
|
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CVE-2026-34577 (GCVE-0-2026-34577)
Vulnerability from cvelistv5 – Published: 2026-04-02 17:24 – Updated: 2026-04-03 15:52
VLAI
EPSS
VEX
Title
Postiz: Unauthenticated Full-Read SSRF via /public/stream Endpoint with Trivially Bypassable Extension Check
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.3, the GET /public/stream endpoint in PublicController accepts a user-supplied url query parameter and proxies the full HTTP response back to the caller. The only validation is url.endsWith('mp4'), which is trivially bypassable by appending .mp4 as a query parameter value or URL fragment. The endpoint requires no authentication and has no SSRF protections, allowing an unauthenticated attacker to read responses from internal services, cloud metadata endpoints, and other network-internal resources. This issue has been patched in version 2.21.3.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 15:52 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.3
|
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CVE-2026-34576 (GCVE-0-2026-34576)
Vulnerability from cvelistv5 – Published: 2026-04-02 17:23 – Updated: 2026-04-02 18:57
VLAI
EPSS
VEX
Title
Postiz: SSRF in upload-from-url endpoint allows fetching internal resources and cloud metadata
Summary
Postiz is an AI social media scheduling tool. Prior to version 2.21.3, the POST /public/v1/upload-from-url endpoint accepts a user-supplied URL and fetches it server-side using axios.get() with no SSRF protections. The only validation is a file extension check (.png, .jpg, etc.) which is trivially bypassed by appending an image extension to any URL path. An authenticated API user can fetch internal network resources, cloud instance metadata, and other internal services, with the response data uploaded to storage and returned to the attacker. This issue has been patched in version 2.21.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:57 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app/security/… | x_refsource_CONFIRM |
| https://github.com/gitroomhq/postiz-app/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.3
|
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