CVE-2023-42451

    Dashboard / Vulnerabilities / CVE-2023-42451

    CVE-2023-42451

    Published: 19 Sept 2023Last Modified: 27 Aug 2026

    Summary: Mastodon Invalid Domain Name Normalization vulnerability

    Details: Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2, under certain circumstances, attackers can exploit a flaw in domain name normalization to spoof domains they do not own. Versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2 contain a patch for this issue.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42451.json, https://github.com/mastodon/mastodon/security/advisories/GHSA-v3xf-c9qf-j667, https://nvd.nist.gov/vuln/detail/CVE-2023-42451, https://github.com/mastodon/mastodon/commit/eeab3560fc0516070b3fb97e089b15ecab1938c8

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -75346a71f7f4f0a3deb2841c19e6105a06f98f1e

    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-2023-42451 | CVE-DB