SB20250211176 - Multiple vulnerabilities in Misskey

Description

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site request forgery (CVE-ID: CVE-2025-24897)

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to perform cross-site request forgery attacks against bull-board APIs.

The vulnerability exists due to cross-site request forgery in bull-board APIs when handling authenticated requests with insecure authentication cookie attributes. A remote attacker can cause the victim's browser to send a crafted request to perform cross-site request forgery attacks against bull-board APIs.

User interaction is required for exploitation.

2) Insufficient Session Expiration (CVE-ID: CVE-2025-24896)

CWE-ID: CWE-613 - Insufficient Session Expiration

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://github.com/misskey-dev/misskey/security/advisories/GHSA-38w6-vx8g-67pp
• https://github.com/misskey-dev/misskey/security/advisories/GHSA-w98m-j6hq-cwjm
• https://github.com/advisories/GHSA-w98m-j6hq-cwjm