PT-2025-51322 · Misskey · Misskey

Published 2025-12-15 · Updated 2026-01-06 · CVE-2025-66402

Positive Technologies (AI Summary)

CVSS v4.0

7.1

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Misskey versions 13.0.0-beta.16 through 2025.12.0

Description Misskey is a federated social media platform. Users without the necessary permissions to view favorites or clips could export posts and access their contents.

Recommendations Update to version 2025.12.0.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2025-66402

GHSA-496G-MMPW-J9X3

Affected Products

Misskey

References · 11

• 🔥 https://github.com/misskey-dev/misskey/security/advisories/GHSA-496g-mmpw-j9x3 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66402.json · Exploit
• https://github.com/misskey-dev/misskey/commit/dc77d59f8712d3fe0b73cd4af2035133839cd57b · Patch
• https://osv.dev/vulnerability/GHSA-496g-mmpw-j9x3 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-66402 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66402 · Security Note
• https://github.com/misskey-dev/misskey · Note
• https://t.me/CVEtracker/39871 · Telegram Post
• https://t.me/cveNotify/147901 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2000881452511035434 · Twitter Post
• https://twitter.com/CVEnew/status/2002857351699959886 · Twitter Post