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Vulnerabilities

Security incident · CVE-2025-62174

Mastodon is a free, open-source social network server based on ActivityPub.

Published Oct 13, 2025 · catalog updated Oct 14, 2025 · Mastodon is a free,

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-62174. EPSS is 0.22%. Act only if a listed version of Mastodon is a free, is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Mastodon is a free,).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Low3.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Version ranges on file
Affected products
vendor mastodon mastodon 4.4.0-beta.1, < 4.4.6

Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon before 4.4.6, 4.3.14, and 4.2.27, when an administrator resets a user account's password via the command-line interface using , active sessions and access tokens for that account are not revoked. This allows an attacker with access to a previously compromised session or token to continue using the account after the password has been reset. This issue has been patched in versions 4.2.27, 4.3.14, and 4.4.6. No known workarounds exist.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor mastodon mastodon 4.4.0-beta.1, < 4.4.64.4.0-beta.1, < 4.4.6

How to fix CVE-2025-62174

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-62174. EPSS is 0.22%. Act only if a listed version of Mastodon is a free, is installed.

Which versions are affected?

Compare what you have installed with mastodon mastodon 4.4.0-beta.1, < 4.4.6 4.4.0-beta.1, < 4.4.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2025 · EUVD

    Detected

    Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon before 4.4.6, 4.3.14, and 4.2.27, when an administrator resets a user account's password via the command-line interface using , active sessions and access tokens for that account are not revoked. This allows an attacker with access to a previously compromised session or token to continue using the account after

  2. Oct 14, 2025 · EUVD

    Updated

    Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon before 4.4.6, 4.3.14, and 4.2.27, when an administrator resets a user account's password via the command-line interface using , active sessions and access tokens for that account are not revoked. This allows an attacker with access to a previously compromised session or token to continue using the account after

Sources

  • CVE.orgVulnerability recordCVE-2025-62174

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-62174

    30-day exploitation probability 0.22%

    first.org
  • EUVDVulnerability recordEUVD-2025-34113

    Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon before 4.4.6, 4.3.14, and 4.2.27, when an administrator resets a user account's password via the command-line interface using , active sessions and access tokens for that account are not revok

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • CVE.orgOct 23, 2026
  • EUVDOct 23, 2026