CVE-2025-24024Network attack vector

Unauthorized moderation commands via unchecked room origin

Published Jan 21, 2025 · Updated Jan 21, 2025

Authorization bypass in Matrix.org Mjolnir 1.9.0 allows remote attackers to execute bot management commands from any joined room. The room.message handler in Mjolnir.ts lets text reach handleCommand without first requiring the configured management-room ID. Any Matrix user able to post in a room shared with the bot can invoke moderation functions, including enabled server-administration components.

CVSS severity9.1
Critical
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Matrix.org Mjolnir 1.9.0 allows remote attackers to execute bot management commands from any joined room. The room.message handler in Mjolnir.ts lets text reach handleCommand without first requiring the configured management-room ID. Any Matrix user able to post in a room shared with the bot can invoke moderation functions, including enabled server-administration components.

The record

CVE
CVE-2025-24024
Published
Jan 21, 2025
Updated
Jan 21, 2025
Vendor
Matrix.org
Product
Mjolnir
Classifications
CWE-671
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 1.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Matrix.org · Mjolnirversion== 1.9.0

Published CVSS scores

9.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-671Lack of Administrator Control over Security

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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