Search criteria
694 vulnerabilities found for mattermost by mattermost
CVE-2025-64641 (GCVE-0-2025-64641)
Vulnerability from nvd – Published: 2025-12-24 08:02 – Updated: 2025-12-24 16:35
VLAI?
Title
Mattermost Jira plugin crafted action leaks Jira issue details
Summary
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts
Severity ?
4.1 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.1.0 , ≤ 11.1.0
(semver)
Affected: 11.0.0 , ≤ 11.0.5 (semver) Affected: 10.12.0 , ≤ 10.12.3 (semver) Affected: 10.11.0 , ≤ 10.11.7 (semver) Unaffected: 11.2.0 Unaffected: 11.1.1 Unaffected: 11.0.6 Unaffected: 10.12.4 Unaffected: 10.11.8 |
Credits
Juho Forsén
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CVE-2025-13767 (GCVE-0-2025-13767)
Vulnerability from nvd – Published: 2025-12-24 08:01 – Updated: 2025-12-24 16:36
VLAI?
Title
Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin
Summary
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to.
Severity ?
4.3 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.1.0 , ≤ 11.1.0
(semver)
Affected: 11.0.0 , ≤ 11.0.5 (semver) Affected: 10.12.0 , ≤ 10.12.3 (semver) Affected: 10.11.0 , ≤ 10.11.7 (semver) Unaffected: 11.2.0 Unaffected: 11.1.1 Unaffected: 11.0.6 Unaffected: 10.12.4 Unaffected: 10.11.8 |
Credits
Juho Forsén
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CVE-2025-14273 (GCVE-0-2025-14273)
Vulnerability from nvd – Published: 2025-12-22 11:24 – Updated: 2025-12-22 12:59
VLAI?
Title
Mattermost Jira plugin user spoofing enables Jira request forgery.
Summary
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 with the Jira plugin enabled and Mattermost Jira plugin versions <=4.4.0 fail to enforce authentication and issue-key path restrictions in the Jira plugin, which allows an unauthenticated attacker who knows a valid user ID to issue authenticated GET and POST requests to the Jira server via crafted plugin payloads that spoof the user ID and inject arbitrary issue key paths. Mattermost Advisory ID: MMSA-2025-00555
Severity ?
7.2 (High)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.1.0 , ≤ 11.1.0
(semver)
Affected: 11.0.0 , ≤ 11.0.5 (semver) Affected: 10.12.0 , ≤ 10.12.3 (semver) Affected: 10.11.0 , ≤ 10.11.7 (semver) Unaffected: 11.2.0 Unaffected: 11.1.1 Unaffected: 11.0.6 Unaffected: 10.12.4 Unaffected: 10.11.8 |
Credits
Juho Forsén
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CVE-2025-13324 (GCVE-0-2025-13324)
Vulnerability from nvd – Published: 2025-12-17 18:14 – Updated: 2025-12-24 10:16
VLAI?
Title
Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation
Summary
Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.
Severity ?
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.5
(semver)
Affected: 11.0.0 , ≤ 11.0.4 (semver) Affected: 10.12.0 , ≤ 10.12.2 (semver) Unaffected: 11.1.0 Unaffected: 10.11.6 Unaffected: 11.0.5 Unaffected: 10.12.3 |
Credits
daw10
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CVE-2025-13326 (GCVE-0-2025-13326)
Vulnerability from nvd – Published: 2025-12-17 18:14 – Updated: 2025-12-17 19:29
VLAI?
Title
Mattermost Desktop App fails to enable Hardened Runtime when packaged for Mac App Store
Summary
Mattermost Desktop App versions <6.0.0 fail to enable the Hardened Runtime on the Mattermost Desktop App when packaged for Mac App Store which allows an attacker to inherit TCC permissions via copying the binary to a tmp folder.
Severity ?
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
0 , ≤ 6.0.0
(semver)
Unaffected: 6.0.0 |
Credits
Karmaz95
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CVE-2025-12689 (GCVE-0-2025-12689)
Vulnerability from nvd – Published: 2025-12-17 18:14 – Updated: 2025-12-17 19:29
VLAI?
Title
DoS in Calls plugin via malformed UTF-8 in WebSocket request
Summary
Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request.
Severity ?
6.5 (Medium)
CWE
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.4
(semver)
Affected: 10.12.0 , ≤ 10.12.2 (semver) Affected: 10.11.0 , ≤ 10.11.6 (semver) Unaffected: 11.1.0 Unaffected: 11.0.5 Unaffected: 10.12.3 Unaffected: 10.11.7 |
Credits
National Security Agency
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CVE-2025-13321 (GCVE-0-2025-13321)
Vulnerability from nvd – Published: 2025-12-17 18:14 – Updated: 2025-12-17 19:29
VLAI?
Title
Mattermost Desktop App logging sensitive information and fails to clear data on server deletion
Summary
Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on server deletion which allows an attacker with access to the users system to gain access to potentially sensitive information via reading the application logs.
Severity ?
CWE
- CWE-532 - Insertion of Sensitive Information into Log Files
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
0 , ≤ 6.0.0
(semver)
Unaffected: 6.0.0 |
Credits
Doyensec
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CVE-2025-62190 (GCVE-0-2025-62190)
Vulnerability from nvd – Published: 2025-12-17 12:07 – Updated: 2025-12-17 15:47
VLAI?
Title
CSRF Allows Call Initiation and Message Delivery
Summary
Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 and Mattermost Calls versions <=1.10.0 fail to implement CSRF protection on the Calls widget page which allows an authenticated attacker to initiate calls and inject messages into channels or direct messages via a malicious webpage or crafted link
Severity ?
4.3 (Medium)
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.4
(semver)
Affected: 10.12.0 , ≤ 10.12.2 (semver) Affected: 10.11.0 , ≤ 10.11.6 (semver) Unaffected: 11.1.0 Unaffected: 11.0.5 Unaffected: 10.12.3 Unaffected: 10.11.7 |
Credits
DoyenSec
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CVE-2025-62690 (GCVE-0-2025-62690)
Vulnerability from nvd – Published: 2025-12-17 12:19 – Updated: 2025-12-17 14:45
VLAI?
Title
Open redirect in error page when link opened in new tab
Summary
Mattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.
Severity ?
CWE
- CWE-601 - CWE‑601: URL Redirection to Untrusted Site (“Open Redirect”)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.4
(semver)
Unaffected: 11.1.0 Unaffected: 10.11.5 |
Credits
Mario Puente
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CVE-2025-13352 (GCVE-0-2025-13352)
Vulnerability from nvd – Published: 2025-12-17 12:11 – Updated: 2025-12-17 16:48
VLAI?
Title
Mattermost GitHub Plugin allows unauthorized GitHub reactions via reaction forwarding hijacking
Summary
Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.
Severity ?
CWE
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.6
(semver)
Unaffected: 11.1.0 Unaffected: 10.11.7 |
Credits
Juho Forsén
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CVE-2025-13870 (GCVE-0-2025-13870)
Vulnerability from nvd – Published: 2025-12-02 09:28 – Updated: 2025-12-02 14:38
VLAI?
Title
Unauthorized access and subscription vulnerability in Boards
Summary
Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to
Severity ?
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.4
(semver)
Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
Doyensec
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CVE-2025-12756 (GCVE-0-2025-12756)
Vulnerability from nvd – Published: 2025-12-01 19:51 – Updated: 2025-12-01 20:02
VLAI?
Title
Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion
Summary
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.
Severity ?
4.3 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.2
(semver)
Affected: 10.12.0 , ≤ 10.12.1 (semver) Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 11.0.3 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
daynight
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CVE-2025-12421 (GCVE-0-2025-12421)
Vulnerability from nvd – Published: 2025-11-27 17:47 – Updated: 2025-12-02 04:55
VLAI?
Title
Account Takeover via Code Exchange Endpoint
Summary
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).
Severity ?
9.9 (Critical)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.2
(semver)
Affected: 10.12.0 , ≤ 10.12.1 (semver) Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 11.0.3 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
daw10
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CVE-2025-12559 (GCVE-0-2025-12559)
Vulnerability from nvd – Published: 2025-11-27 16:36 – Updated: 2025-11-28 15:20
VLAI?
Title
Information Disclosure in Common Teams API
Summary
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint
Severity ?
4.3 (Medium)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.2
(semver)
Affected: 10.12.0 , ≤ 10.12.1 (semver) Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 11.0.3 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
hainguyen0207
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CVE-2025-12419 (GCVE-0-2025-12419)
Vulnerability from nvd – Published: 2025-11-27 15:55 – Updated: 2025-12-02 04:55
VLAI?
Title
Account takeover on OAuth/OpenID-enabled servers
Summary
Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost.
Severity ?
9.9 (Critical)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.12.0 , ≤ 10.12.1
(semver)
Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Affected: 11.0.0 , ≤ 11.0.3 (semver) Unaffected: 11.1.0 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 Unaffected: 11.0.4 |
Credits
daw10
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CVE-2025-64641 (GCVE-0-2025-64641)
Vulnerability from cvelistv5 – Published: 2025-12-24 08:02 – Updated: 2025-12-24 16:35
VLAI?
Title
Mattermost Jira plugin crafted action leaks Jira issue details
Summary
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts
Severity ?
4.1 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.1.0 , ≤ 11.1.0
(semver)
Affected: 11.0.0 , ≤ 11.0.5 (semver) Affected: 10.12.0 , ≤ 10.12.3 (semver) Affected: 10.11.0 , ≤ 10.11.7 (semver) Unaffected: 11.2.0 Unaffected: 11.1.1 Unaffected: 11.0.6 Unaffected: 10.12.4 Unaffected: 10.11.8 |
Credits
Juho Forsén
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CVE-2025-13767 (GCVE-0-2025-13767)
Vulnerability from cvelistv5 – Published: 2025-12-24 08:01 – Updated: 2025-12-24 16:36
VLAI?
Title
Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin
Summary
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to.
Severity ?
4.3 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.1.0 , ≤ 11.1.0
(semver)
Affected: 11.0.0 , ≤ 11.0.5 (semver) Affected: 10.12.0 , ≤ 10.12.3 (semver) Affected: 10.11.0 , ≤ 10.11.7 (semver) Unaffected: 11.2.0 Unaffected: 11.1.1 Unaffected: 11.0.6 Unaffected: 10.12.4 Unaffected: 10.11.8 |
Credits
Juho Forsén
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CVE-2025-14273 (GCVE-0-2025-14273)
Vulnerability from cvelistv5 – Published: 2025-12-22 11:24 – Updated: 2025-12-22 12:59
VLAI?
Title
Mattermost Jira plugin user spoofing enables Jira request forgery.
Summary
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 with the Jira plugin enabled and Mattermost Jira plugin versions <=4.4.0 fail to enforce authentication and issue-key path restrictions in the Jira plugin, which allows an unauthenticated attacker who knows a valid user ID to issue authenticated GET and POST requests to the Jira server via crafted plugin payloads that spoof the user ID and inject arbitrary issue key paths. Mattermost Advisory ID: MMSA-2025-00555
Severity ?
7.2 (High)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.1.0 , ≤ 11.1.0
(semver)
Affected: 11.0.0 , ≤ 11.0.5 (semver) Affected: 10.12.0 , ≤ 10.12.3 (semver) Affected: 10.11.0 , ≤ 10.11.7 (semver) Unaffected: 11.2.0 Unaffected: 11.1.1 Unaffected: 11.0.6 Unaffected: 10.12.4 Unaffected: 10.11.8 |
Credits
Juho Forsén
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CVE-2025-13326 (GCVE-0-2025-13326)
Vulnerability from cvelistv5 – Published: 2025-12-17 18:14 – Updated: 2025-12-17 19:29
VLAI?
Title
Mattermost Desktop App fails to enable Hardened Runtime when packaged for Mac App Store
Summary
Mattermost Desktop App versions <6.0.0 fail to enable the Hardened Runtime on the Mattermost Desktop App when packaged for Mac App Store which allows an attacker to inherit TCC permissions via copying the binary to a tmp folder.
Severity ?
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
0 , ≤ 6.0.0
(semver)
Unaffected: 6.0.0 |
Credits
Karmaz95
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CVE-2025-13324 (GCVE-0-2025-13324)
Vulnerability from cvelistv5 – Published: 2025-12-17 18:14 – Updated: 2025-12-24 10:16
VLAI?
Title
Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation
Summary
Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.
Severity ?
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.5
(semver)
Affected: 11.0.0 , ≤ 11.0.4 (semver) Affected: 10.12.0 , ≤ 10.12.2 (semver) Unaffected: 11.1.0 Unaffected: 10.11.6 Unaffected: 11.0.5 Unaffected: 10.12.3 |
Credits
daw10
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CVE-2025-13321 (GCVE-0-2025-13321)
Vulnerability from cvelistv5 – Published: 2025-12-17 18:14 – Updated: 2025-12-17 19:29
VLAI?
Title
Mattermost Desktop App logging sensitive information and fails to clear data on server deletion
Summary
Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on server deletion which allows an attacker with access to the users system to gain access to potentially sensitive information via reading the application logs.
Severity ?
CWE
- CWE-532 - Insertion of Sensitive Information into Log Files
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
0 , ≤ 6.0.0
(semver)
Unaffected: 6.0.0 |
Credits
Doyensec
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CVE-2025-12689 (GCVE-0-2025-12689)
Vulnerability from cvelistv5 – Published: 2025-12-17 18:14 – Updated: 2025-12-17 19:29
VLAI?
Title
DoS in Calls plugin via malformed UTF-8 in WebSocket request
Summary
Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request.
Severity ?
6.5 (Medium)
CWE
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.4
(semver)
Affected: 10.12.0 , ≤ 10.12.2 (semver) Affected: 10.11.0 , ≤ 10.11.6 (semver) Unaffected: 11.1.0 Unaffected: 11.0.5 Unaffected: 10.12.3 Unaffected: 10.11.7 |
Credits
National Security Agency
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CVE-2025-62690 (GCVE-0-2025-62690)
Vulnerability from cvelistv5 – Published: 2025-12-17 12:19 – Updated: 2025-12-17 14:45
VLAI?
Title
Open redirect in error page when link opened in new tab
Summary
Mattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.
Severity ?
CWE
- CWE-601 - CWE‑601: URL Redirection to Untrusted Site (“Open Redirect”)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.4
(semver)
Unaffected: 11.1.0 Unaffected: 10.11.5 |
Credits
Mario Puente
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CVE-2025-13352 (GCVE-0-2025-13352)
Vulnerability from cvelistv5 – Published: 2025-12-17 12:11 – Updated: 2025-12-17 16:48
VLAI?
Title
Mattermost GitHub Plugin allows unauthorized GitHub reactions via reaction forwarding hijacking
Summary
Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.
Severity ?
CWE
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.6
(semver)
Unaffected: 11.1.0 Unaffected: 10.11.7 |
Credits
Juho Forsén
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CVE-2025-62190 (GCVE-0-2025-62190)
Vulnerability from cvelistv5 – Published: 2025-12-17 12:07 – Updated: 2025-12-17 15:47
VLAI?
Title
CSRF Allows Call Initiation and Message Delivery
Summary
Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 and Mattermost Calls versions <=1.10.0 fail to implement CSRF protection on the Calls widget page which allows an authenticated attacker to initiate calls and inject messages into channels or direct messages via a malicious webpage or crafted link
Severity ?
4.3 (Medium)
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.4
(semver)
Affected: 10.12.0 , ≤ 10.12.2 (semver) Affected: 10.11.0 , ≤ 10.11.6 (semver) Unaffected: 11.1.0 Unaffected: 11.0.5 Unaffected: 10.12.3 Unaffected: 10.11.7 |
Credits
DoyenSec
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CVE-2025-13870 (GCVE-0-2025-13870)
Vulnerability from cvelistv5 – Published: 2025-12-02 09:28 – Updated: 2025-12-02 14:38
VLAI?
Title
Unauthorized access and subscription vulnerability in Boards
Summary
Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to
Severity ?
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.11.0 , ≤ 10.11.4
(semver)
Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
Doyensec
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CVE-2025-12756 (GCVE-0-2025-12756)
Vulnerability from cvelistv5 – Published: 2025-12-01 19:51 – Updated: 2025-12-01 20:02
VLAI?
Title
Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion
Summary
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.
Severity ?
4.3 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.2
(semver)
Affected: 10.12.0 , ≤ 10.12.1 (semver) Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 11.0.3 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
daynight
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CVE-2025-12421 (GCVE-0-2025-12421)
Vulnerability from cvelistv5 – Published: 2025-11-27 17:47 – Updated: 2025-12-02 04:55
VLAI?
Title
Account Takeover via Code Exchange Endpoint
Summary
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).
Severity ?
9.9 (Critical)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.2
(semver)
Affected: 10.12.0 , ≤ 10.12.1 (semver) Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 11.0.3 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
daw10
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CVE-2025-12559 (GCVE-0-2025-12559)
Vulnerability from cvelistv5 – Published: 2025-11-27 16:36 – Updated: 2025-11-28 15:20
VLAI?
Title
Information Disclosure in Common Teams API
Summary
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint
Severity ?
4.3 (Medium)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.0.0 , ≤ 11.0.2
(semver)
Affected: 10.12.0 , ≤ 10.12.1 (semver) Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Unaffected: 11.1.0 Unaffected: 11.0.3 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 |
Credits
hainguyen0207
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CVE-2025-12419 (GCVE-0-2025-12419)
Vulnerability from cvelistv5 – Published: 2025-11-27 15:55 – Updated: 2025-12-02 04:55
VLAI?
Title
Account takeover on OAuth/OpenID-enabled servers
Summary
Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost.
Severity ?
9.9 (Critical)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.12.0 , ≤ 10.12.1
(semver)
Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Affected: 11.0.0 , ≤ 11.0.3 (semver) Unaffected: 11.1.0 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 Unaffected: 11.0.4 |
Credits
daw10
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{
"status": "unaffected",
"version": "11.0.4"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "daw10"
}
],
"descriptions": [
{
"lang": "en",
"value": "Mattermost versions 10.12.x \u003c= 10.12.1, 10.11.x \u003c= 10.11.4, 10.5.x \u003c= 10.5.12, 11.0.x \u003c= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.9,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-303",
"description": "CWE-303: Incorrect Implementation of Authentication Algorithm",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-11-27T17:18:07.520Z",
"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
"shortName": "Mattermost"
},
"references": [
{
"url": "https://mattermost.com/security-updates"
}
],
"solutions": [
{
"lang": "en",
"value": "Update Mattermost to versions 11.1.0, 10.12.2, 10.11.5, 10.5.13, 11.0.4 or higher."
}
],
"source": {
"advisory": "MMSA-2025-00547",
"defect": [
"https://mattermost.atlassian.net/browse/MM-66371"
],
"discovery": "EXTERNAL"
},
"title": "Account takeover on OAuth/OpenID-enabled servers"
}
},
"cveMetadata": {
"assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
"assignerShortName": "Mattermost",
"cveId": "CVE-2025-12419",
"datePublished": "2025-11-27T15:55:44.815Z",
"dateReserved": "2025-10-28T16:09:58.730Z",
"dateUpdated": "2025-12-02T04:55:58.042Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}