Vulnerability from bitnami_vulndb
Published
2024-07-09 07:24
Modified
2026-09-08 08:34
Summary
Mastodon has improper authorship check on audience extension for existing posts
Details

Mastodon is a self-hosted, federated microblogging platform. Starting in version 2.6.0 and prior to versions 4.1.18 and 4.2.10, by crafting specific activities, an attacker can extend the audience of a post they do not own to other Mastodon users on a target server, thus gaining access to the contents of a post not intended for them. Versions 4.1.18 and 4.2.10 contain a patch for this issue.

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "mastodon",
        "purl": "pkg:bitnami/mastodon"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.0"
            },
            {
              "fixed": "4.1.18"
            },
            {
              "introduced": "4.2.0"
            },
            {
              "fixed": "4.2.10"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-37903"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "Mastodon is a self-hosted, federated microblogging platform. Starting in version 2.6.0 and prior to versions 4.1.18 and 4.2.10, by crafting specific activities, an attacker can extend the audience of a post they do not own to other Mastodon users on a target server, thus gaining access to the contents of a post not intended for them. Versions 4.1.18 and 4.2.10 contain a patch for this issue.",
  "id": "BIT-mastodon-2024-37903",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2024-07-09T07:24:52.373Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/mastodon/mastodon/commit/a1c7aae28aecf06659c5b18cfa131b37cd1512a3"
    },
    {
      "type": "FIX",
      "url": "https://github.com/mastodon/mastodon/commit/d4bf22b632ea8b1174375c4966a6768ab66393b6"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.1.18"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.2.10"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-xjvf-fm67-4qc3"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-37903"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Mastodon has improper authorship check on audience extension for existing posts"
}



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Sightings

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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