Medium 4.3Published Oct 13, 2025

CVE-2025-62175Mastodon streaming API fails to disconnect disabled and suspended users

Updated under an hour ago (Oct 27, 2026, 1:30 PM ET)

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It affects mastodon and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for mastodon

Exploited in the last 30 days

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: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-273, CWE-274
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 14, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

mastodon mastodon mastodon:mastodon (from the name)	from 4.4.0-beta.1, < 4.4.6; from 4.3.0-beta.1, < 4.3.14; before 4.2.27	CNA record
joinmastodon mastodon joinmastodon:mastodon	before 4.2.27; from 4.3.0 before 4.3.14; from 4.4.0 before 4.4.6	NVD

References

References

https://github.com/mastodon/mastodon/security/advisories/GHSA-r2fh-jr9c-9pxh	x-refsource-confirm, vendor-advisory
https://github.com/mastodon/mastodon/commit/2971ac9863b91372e68ac152caf6f4dbff511d17	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.