Insufficient Session Expiration in Mastodon - CVE-2025-62174
Published: April 23, 2026
Vulnerability identifier: #VU126984
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-62174
CWE-ID: CWE-613
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mastodon
Affected software:
Mastodon
Mastodon
Detailed vulnerability description
The vulnerability allows a remote user to continue using compromised sessions and access tokens to disclose sensitive information.
The vulnerability exists due to insufficient session expiration in session and access token handling when an administrator resets an account password via the CLI. A remote user can reuse previously issued sessions or access tokens to disclose sensitive information.
User interaction is required because an administrator must perform the password reset action.
How to mitigate CVE-2025-62174
Install security update from vendor's website.