CVE-2025-25306

Misskey's Incomplete Patch of CVE-2024-52591 Leads to Forgery of Federated Notes

Description

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.

Category

9.3
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.02%
Affected: misskey-dev misskey
Published at:
Updated at:

References

Link Tags
https://github.com/misskey-dev/misskey/security/advisories/GHSA-6w2c-vf6f-xf26
https://github.com/misskey-dev/misskey/releases/tag/2025.2.1

Frequently Asked Questions

What is the severity of CVE-2025-25306?
CVE-2025-25306 has been scored as a critical severity vulnerability.
How to fix CVE-2025-25306?
To fix CVE-2025-25306, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-25306 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-25306 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-25306?
CVE-2025-25306 affects misskey-dev misskey.
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