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Status published
High
CVE-2025-66402
misskey.js's export data contains private post data
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Affected Vendor
misskey-dev
View all reports →Affected Software
misskey
Vulnerable Versions:
>= 13.0.0-beta.16, < 2025.12.0
Timeline
Official Publish:
December 15th, 2025
Last Modified:
December 16th, 2025
Added to House:
July 22nd, 2026