CVE-2025-62175

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.

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-25)

CWEs

CWE-273, CWE-274

Published

2025-10-13

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

Affected

• joinmastodon:mastodon

References

• https://github.com/mastodon/mastodon/commit/2971ac9863b91372e68ac152caf6f4dbff511d17
• https://github.com/mastodon/mastodon/security/advisories/GHSA-r2fh-jr9c-9pxh

Check your stackJSON