What’s Vulnerable › Vulnerabilities
CVE-2024-52591: Missing validation allows spoofed profiles and notes in Misskey
- Severity: critical (CVSS 9.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-12-18 · updated 2026-06-17
- Weakness: CWE-20
Description
Misskey is an open source, federated social media platform. In affected versions missing validation in `ApRequestService.signedGet` and `HttpRequestService.getActivityJson` allows an attacker to create fake user profiles and forged notes. The spoofed users will appear to be from a different instance than the one where they actually exist, and the forged notes will appear to be posted by a different user. Vulnerable Misskey instances will accept the spoofed objects as valid, allowing an attacker to impersonate other users and instances. The attacker retains full control of the spoofed user / note and can interact like a real account. This issue has been addressed in version 2024.11.0-alpha.3. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected products
- misskey-dev misskey: before 2024.11.0; 2024.11.0-alpha0, 2024.11.0-alpha1, 2024.11.0-alpha2 — fixed in 2024.11.0
How to fix
Upgrade to a fixed version: misskey-dev misskey 2024.11.0. Check the vendor advisory for mitigations.
References
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