CVE-2023-42450

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    CVE-2023-42450

    Published: 19 Sept 2023Last Modified: 27 Aug 2026

    Summary: Mastodon Server-Side Request Forgery vulnerability

    Details: Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 4.2.0-beta1 and prior to version 4.2.0-rc2, by crafting specific input, attackers can inject arbitrary data into HTTP requests issued by Mastodon. This can be used to perform confused deputy attacks if the server configuration includes `ALLOWED_PRIVATE_ADDRESSES` to allow access to local exploitable services. Version 4.2.0-rc2 has a patch for the issue.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42450.json, https://github.com/mastodon/mastodon/security/advisories/GHSA-hcqf-fw2r-52g4, https://nvd.nist.gov/vuln/detail/CVE-2023-42450, https://github.com/mastodon/mastodon/commit/94893cf24fc95b32cc7a756262acbe008c20a9d2

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- dab54ccbba3721382241725bb1c1159d24b5aab2
    Fixed -f4b780ba22d0256770766185cee5f8fcc5585c95

    Affected versions

    4.2.0-beta1
    4.2.0-beta2
    4.2.0-beta3
    4.2.0-rc1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2023-42450 | CVE-DB