CVE-2025-62176 (GCVE-0-2025-62176)
Vulnerability from cvelistv5
Published
2025-10-13 21:04
Modified
2025-10-14 13:53
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Summary
Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon before 4.4.6, 4.3.14, and 4.2.27, the streaming server accepts serving events for public timelines to clients using any valid authentication token, even if those tokens lack the read:statuses scope. This allows OAuth clients without the read scope to subscribe to public channels and receive public timeline events. The impact is limited, as this only affects new public posts published on the public timelines and requires an otherwise valid token, but this may lead to unexpected access to public posts in a limited-federation setting. This issue has been patched in versions 4.4.6, 4.3.14, and 4.2.27. No known workarounds exist.
References
security-advisories@github.comhttps://github.com/mastodon/mastodon/commit/7e98fa9b476fdaed235519f1d527eb956004ba0c
security-advisories@github.comhttps://github.com/mastodon/mastodon/security/advisories/GHSA-7gwh-mw97-qjgp
Impacted products
Vendor Product Version
mastodon mastodon Version: >= 4.4.0-beta.1, < 4.4.6
Version: >= 4.3.0-beta.1, < 4.3.14
Version: < 4.2.27
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