Data Exposure in Misskey Platform by Undesirable Actors

CVE-2025-66402

What is CVE-2025-66402?

Misskey, an open-source federated social media platform, has a vulnerability that allows unauthorized users to export posts and view content that they should not have access to. This issue affects versions 13.0.0-beta.16 through 2025.12.0. The exposure of favorites and clips by unauthorized actors can lead to privacy concerns and data leakage. The vulnerability has been addressed in version 2025.12.0, emphasizing the importance of updating to the latest version to safeguard user data.

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