Vulnerability in Joinmastodon Mastodon
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.
EPSS: 0.002 (11.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Joinmastodon Mastodon
- Mastodon — versions >= 4.4.0-beta.1, < 4.4.6, >= 4.3.0-beta.1, < 4.3.14, < 4.2.27
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-62175?
- CVE-2025-62175 is a medium-severity vulnerability in Joinmastodon Mastodon, classified under Improper Check for Dropped Privileges. CVSS score: 4.3/10. Published 2025-10-13.
- How severe is CVE-2025-62175?
- Medium severity. CVSS v3 base score is 4.3 out of 10.