Vulnerability · Published Jan 21, 2025 · Assigned by GitHub_M

CVE-2025-24024Mjolnir v1.9.0 accepts commands from any room

Critical 9.1

In plain English

A critical-severity security flaw in mjolnir from matrix-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.6%top 50.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
matrix-org	mjolnir	= 1.9.0

Weakness: CWE-671 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References

https://github.com/matrix-org/mjolnir/security/advisories/GHSA-3jq6-xc85-m394 x_refsource_CONFIRM
https://github.com/matrix-org/mjolnir/commit/b437fa16b5425985715df861987c836affd51eea x_refsource_MISC
https://github.com/matrix-org/mjolnir/commit/d0ef527a9e3eb45e17143d5295a64b775ccaa23d x_refsource_MISC