CVE-2025-62175: Mastodon streaming API fails to disconnect disabled and suspended users
Mastodon is a free, open-source social network server based on ActivityPub. In versions before 4.4.6, 4.3.14, and 4.2.27, disabling or suspending a user account does not disconnect the account from the streaming API. This allows disabled or suspended accounts to continue receiving real-time updates through existing streaming connections and to establish new streaming connections, even though they cannot interact with other API endpoints. This undermines moderation actions, as administrators expect disabled or suspended accounts to be fully disconnected from the service. This issue has been patched in versions 4.4.6, 4.3.14, and 4.2.27. No known workarounds exist.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-62175?
CVE-2025-62175 is considered a moderate severity vulnerability affecting certain versions of Mastodon.
How do I fix CVE-2025-62175?
To fix CVE-2025-62175, update Mastodon to version 4.4.6 or later, or to 4.3.14 or later, or to 4.2.27 or later.
What does CVE-2025-62175 allow?
CVE-2025-62175 allows suspended or disabled user accounts to continue receiving updates from the streaming API.
Which versions of Mastodon are affected by CVE-2025-62175?
The affected versions include all versions prior to 4.4.6, 4.3.14, and 4.2.27 of Mastodon.
Who is impacted by CVE-2025-62175?
Users and administrators of Mastodon who have accounts disabled or suspended in affected versions are impacted by CVE-2025-62175.