CVE-2025-66402

misskey.js's export data contains private post data

CVSS 7.1 HIGHEPSS 0.3%CWE-862

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.

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

Affected products

misskey-dev · misskey

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References

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