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.

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…

EPSS: 0.002 (6.2th percentile) — read the EPSS interpretation.

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.

Affected products

Misskey
Misskey-dev Misskey — versions < 2025.2.1

Weakness classification (CWE)

CWE-346 — Origin Validation Error
CWE-441 — Unintended Proxy or Intermediary (Confused Deputy)
CWE-1025

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

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.