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    6 vulnerabilities found for ech0 by ech0

    CVE-2026-35037 (GCVE-0-2026-35037)

    Vulnerability from nvd – Published: 2026-04-06 16:56 – Updated: 2026-04-06 18:48
    VLAI
    Title
    Ech0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadata
    Summary
    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, the GET /api/website/title endpoint accepts an arbitrary URL via the website_url query parameter and makes a server-side HTTP request to it without any validation of the target host or IP address. The endpoint requires no authentication. An attacker can use this to reach internal network services, cloud metadata endpoints (169.254.169.254), and localhost-bound services, with partial response data exfiltrated via the HTML <title> tag extraction This vulnerability is fixed in 4.2.8.
    Severity
    7.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    lin-snow Ech0 Affected: < 4.2.8
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-35036 (GCVE-0-2026-35036)

    Vulnerability from nvd – Published: 2026-04-06 16:55 – Updated: 2026-04-07 14:09
    VLAI
    Title
    Ech0 Affected by Unauthenticated Server-Side Request Forgery in Website Preview Feature
    Summary
    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, Ech0 implements link preview (editor fetches a page title) through GET /api/website/title. That is legitimate product behavior, but the implementation is unsafe: the route is unauthenticated, accepts a fully attacker-controlled URL, performs a server-side GET, reads the entire response body into memory (io.ReadAll). There is no host allowlist, no SSRF filter, and InsecureSkipVerify: true on the outbound client. Anyone who can reach the instance can force the Ech0 server to open HTTP/HTTPS URLs of their choice as seen from the server’s network position (Docker bridge, VPC, localhost from the process view). This vulnerability is fixed in 4.2.8.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    lin-snow Ech0 Affected: < 4.2.8
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-33638 (GCVE-0-2026-33638)

    Vulnerability from nvd – Published: 2026-03-26 20:52 – Updated: 2026-03-27 20:19
    VLAI
    Title
    Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint
    Summary
    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, `GET /api/allusers` is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user profile metadata. A fix is available in v4.2.0.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    lin-snow Ech0 Affected: < 4.2.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-35037 (GCVE-0-2026-35037)

    Vulnerability from cvelistv5 – Published: 2026-04-06 16:56 – Updated: 2026-04-06 18:48
    VLAI
    Title
    Ech0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadata
    Summary
    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, the GET /api/website/title endpoint accepts an arbitrary URL via the website_url query parameter and makes a server-side HTTP request to it without any validation of the target host or IP address. The endpoint requires no authentication. An attacker can use this to reach internal network services, cloud metadata endpoints (169.254.169.254), and localhost-bound services, with partial response data exfiltrated via the HTML <title> tag extraction This vulnerability is fixed in 4.2.8.
    Severity
    7.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    lin-snow Ech0 Affected: < 4.2.8
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-35036 (GCVE-0-2026-35036)

    Vulnerability from cvelistv5 – Published: 2026-04-06 16:55 – Updated: 2026-04-07 14:09
    VLAI
    Title
    Ech0 Affected by Unauthenticated Server-Side Request Forgery in Website Preview Feature
    Summary
    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, Ech0 implements link preview (editor fetches a page title) through GET /api/website/title. That is legitimate product behavior, but the implementation is unsafe: the route is unauthenticated, accepts a fully attacker-controlled URL, performs a server-side GET, reads the entire response body into memory (io.ReadAll). There is no host allowlist, no SSRF filter, and InsecureSkipVerify: true on the outbound client. Anyone who can reach the instance can force the Ech0 server to open HTTP/HTTPS URLs of their choice as seen from the server’s network position (Docker bridge, VPC, localhost from the process view). This vulnerability is fixed in 4.2.8.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    lin-snow Ech0 Affected: < 4.2.8
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-33638 (GCVE-0-2026-33638)

    Vulnerability from cvelistv5 – Published: 2026-03-26 20:52 – Updated: 2026-03-27 20:19
    VLAI
    Title
    Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint
    Summary
    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, `GET /api/allusers` is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user profile metadata. A fix is available in v4.2.0.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    lin-snow Ech0 Affected: < 4.2.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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