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TI-2025-18598 Aliases CVE-2025-24896

Misskey allows token to remain valid in cookie after signing out

Priority LOW 38CWE-613Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-613.

Summary

Misskey is an open source, federated social media platform. Starting in version 12.109.0 and prior to version 2025.2.0-alpha.0, a login token named `token` is stored in a cookie for authentication purposes in Bull Dashboard, but this remains undeleted even after logout is performed. The primary affected users will be users who have logged into Misskey using a public PC or someone else's device, but it's possible that users who have logged out of Misskey before lending their PC to someone else could also be affected. Version 2025.2.0-alpha.0 contains a fix for this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00599 48th percentileScored 2026-11-07
Fix Fixed misskey (misskey-dev): 2025.2.0-alpha.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
misskey-devmisskey12.109.0 to before 2025.2.0-alpha.02025.2.0-alpha.0Patch availableCNA
  • misskey Vendormisskey-dev Affected 12.109.0 to before 2025.2.0-alpha.0 Fixed in 2025.2.0-alpha.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*12.109.0 – 2025.1.0Vulnerablemisskey-dev
  • cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:* Versions 12.109.0 – 2025.1.0 Vulnerable ·misskey-dev

Remediation

  • Fix · CNA misskey (misskey-dev) Fixed in 2025.2.0-alpha.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-24896

References

Patch 1

Advisory 1

  • TI-2025-18599 Misskey CSRF vulnerability due to insecure configuration of authentication cookie attributes CVSS 3.1HIGH 8.2
  • TI-2025-29081 Misskey CSS Style Injection Vulnerability In `MkUrlPreview` CVSS 3.1HIGH 7.2
  • TI-2025-40906 Misskey has a login rate limit bypass via spoofed X-Forwarded-For header CVSS 4.0MEDIUM 6.9
  • TI-2025-29276 Misskey Directory Traversal Vulnerability in AiScript via `Mk:api` CVSS 3.1HIGH 7.5
  • TI-2025-40839 misskey.js's export data contains private post data CVSS 4.0HIGH 7.1
  • TI-2026-22705 Misskey lacks proper authorization checks and input validation CVSS 4.0CRITICAL 9.2
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences