CVE-2025-66402

misskey.js's export data contains private post data

State: Published
Severity: 7.1 High
Published: Dec 15, 2025
Updated: Dec 16, 2025
Reserved: Nov 28, 2025

Description

Misskey is an open source, federated social media platform. Starting in version 13.0.0-beta.16 and prior to version 2025.12.0, an actor who does not have permission to view favorites or clips can can export the posts and view the contents. Version 2025.12.0 fixes the issue.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
misskeymisskey-dev	>= 13.0.0-beta.16, < 2025.12.0Affected

References

https://github.com/misskey-dev/misskey/security/advisories/GHSA-496g-mmpw-j9x3
https://github.com/misskey-dev/misskey/commit/dc77d59f8712d3fe0b73cd4af2035133839cd57b

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