CVE-2025-24024CRITICAL 9.1EPSS p42.8%

CVE-2025-24024CVE-2025-24024

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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS0.57% probability of exploitation · percentile 42.8% · 2026-06-19T12:03:05Z
Published2025-01-21
Last modified2026-04-15

Underlying weaknesses· 1

CWE-671

References

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

1

TypeTargetConfidenceTier
WeaknessLack of Administrator Control over Securitycwe-6710%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.