CVE-2025-25306 Misskey's Incomplete Patch of CVE-2024-52591 Leads to Forgery of Federated Notes
Attackers can forge federated notes by exploiting insufficient validation of ActivityPub object fields, allowing unauthorized content attribution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-25306?
CVE-2025-25306 is a critical vulnerability in misskey-dev misskey, published on 10 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-25306?
It affects 1 product.
Products include Misskey Misskey.
How do I fix CVE-2025-25306?
No fix has been published for CVE-2025-25306 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-25306 being exploited?
There is no known exploitation of CVE-2025-25306 in the wild and no public exploit code.
Other vulnerabilities in misskey-dev misskey
- CVE-2023-49079 Misskey's missing signature validation allows arbitrary users to impersonate any remote user.
- CVE-2026-28431 Misskey lacks proper authorization checks and input validation
- CVE-2023-52139 Misskey vulnerable to improper authorization when accessing with third-party application
- CVE-2024-52590 Missing validation allows spoofed profiles in Misskey
- CVE-2024-52591 Missing validation allows spoofed profiles and notes in Misskey
Sources
Also known as GHSA-6w2c-vf6f-xf26.