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Permalink CVE-2026-23961
5.3 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): NONE
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): NONE
  • Integrity impact (I): LOW
  • Availability impact (A): NONE
created 2 months, 1 week ago
Mastodon may allow a remote suspension bypass

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon allows server administrators to suspend remote users to prevent interactions. However, some logic errors allow already-known posts from such suspended users to appear in timelines if boosted. Furthermore, under certain circumstances, previously-unknown posts from suspended users can be processed. This issue allows old posts from suspended users to occasionally end up on timelines on all Mastodon versions. Additionally, on Mastodon versions from v4.5.0 to v4.5.4, v4.4.5 to v4.4.11, v4.3.13 to v4.3.17, and v4.2.26 to v4.2.29, remote suspended users can partially bypass the suspension to get new posts in. Mastodon versions v4.5.5, v4.4.12, v4.3.18 are patched.

References

Affected products

mastodon
  • ==>= 4.5.0, < 4.5.5
  • ==< 4.3.18
  • ==>= 4.4.0, < 4.4.12

Matching in nixpkgs

pkgs.mastodon

Self-hosted, globally interconnected microblogging software based on ActivityPub

pkgs.mastodon-bot

Bot to publish twitter, tumblr or rss posts to an mastodon account.

Package maintainers