Insufficient Session Expiration in Misskey - CVE-2025-24896
Published: February 11, 2025 / Updated: April 28, 2026
Vulnerability identifier: #VU128336
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-24896
CWE-ID: CWE-613
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Misskey Development Division
Affected software:
Misskey
Misskey
Detailed vulnerability description
The vulnerability allows a remote attacker to gain unauthorized access to a user's session.
The vulnerability exists due to insufficient session expiration in the Bull Dashboard authentication cookie when processing logout operations. A remote attacker can reuse an undeleted authentication token cookie to gain unauthorized access to a user's session.
User interaction is required because the issue is exploitable after a user logs out on a public or shared device.
How to mitigate CVE-2025-24896
Install security update from vendor's website.