CVE-2025-62175

Medium

Description

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.

SeverityMedium
CVSS4.3
Exploit probability—
ProductMastodon
PublishedOct 13, 2025
First seenOct 13, 2025

How to fix

Update
  • joinmastodon mastodon4.2.27, 4.3.14, 4.4.6 or later

Affected products

ProductAffected versionsFixed in
joinmastodon mastodonv < 4.2.27, 4.3.0 ≤ v < 4.3.14, 4.4.0 ≤ v < 4.4.64.2.27, 4.3.14, 4.4.6

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