Vulnerability in Misskey
CVE-2025-25306
Misskey is an open source, federated social media platform. The patch for CVE-2024-52591 did not sufficiently validate the relation between the `id` and `url` fields of ActivityPub objects. An attacker can forge an object where they claim authority in the `url` field even if the specific ActivityPub object type require authority in the `id` field. Version 2025.2.1 addresses the issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Misskey
- Misskey-Dev Misskey — versions < 2025.2.1
Weakness classification (CWE)
References
- github.com/misskey-dev/misskey/security/advisories/GHSA-6w2c-vf6f-xf26 (Third Party Advisory)
- github.com/misskey-dev/misskey/releases/tag/2025.2.1 (Patch)
Frequently asked questions
- What is CVE-2025-25306?
- CVE-2025-25306 is a critical-severity vulnerability in Misskey, classified under Origin Validation Error. CVSS score: 9.3/10. Published 2025-03-10.
- How severe is CVE-2025-25306?
- Critical severity. CVSS v3 base score is 9.3 out of 10.