CVE-2025-24024 Mjolnir v1.9.0 accepts commands from any room
Mjolnir bot accepts admin commands from any room, allowing unauthorized users to perform moderation and server administration actions.
- 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-2025-24024?
CVE-2025-24024 is a critical missing authorization vulnerability in matrix-org mjolnir, published on 21 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Mjolnir is a moderation tool for Matrix. Mjolnir v1.9.0 responds to management commands from any room the bot is member of. This can allow users who aren't operators of the bot to use the bot's functions, including server administration components if enabled. Version 1.9.1 reverts the feature that introduced the bug, and version 1.9.2 reintroduces the feature safely. Downgrading to version 1.8.3 is recommended if upgrading to 1.9.1 or higher isn't possible.
Weakness: CWE-671
Which versions are affected by CVE-2025-24024?
How do I fix CVE-2025-24024?
No fix has been published for CVE-2025-24024 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-24024 being exploited?
There is no known exploitation of CVE-2025-24024 in the wild and no public exploit code.
Sources
Also known as GHSA-3jq6-xc85-m394.