CVE-2025-62175 Mastodon streaming API fails to disconnect disabled and suspended users
Disabled or suspended users can maintain streaming API connections to receive real-time updates, bypassing moderation controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-62175?
CVE-2025-62175 is a medium-severity missing authorization vulnerability in mastodon, published on 13 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-62175?
1 open source package ship an affected version, including mastodon. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mastodon Bitnami | All versions | 4.2.27, 4.3.14, 4.4.6 |
Products include Joinmastodon Mastodon.
How do I fix CVE-2025-62175?
Upgrade mastodon to a fixed version for your release line: 4.2.27, 4.3.14 or 4.4.6.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-62175 being exploited?
There is no known exploitation of CVE-2025-62175 in the wild and no public exploit code.
Other vulnerabilities in mastodon
- CVE-2023-36460 Mastodon vulnerable to arbitrary file creation through media attachments
- CVE-2022-2166 Improper Restriction of Excessive Authentication Attempts in mastodon/mastodon
- CVE-2022-24307 Missing authorization in n/a
- CVE-2018-21018 Auth bypass in n/a
- CVE-2024-23832 Mastodon Remote user impersonation and takeover
Sources
Also known as BIT-mastodon-2025-62175, GHSA-r2fh-jr9c-9pxh.