CVE-2025-24024

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 54% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
—
EPSS
43.8%
KEV
Not listed

Published

January 21, 2025

Last Modified

April 15, 2026

Advisory Details (3)

Auto-updated May 21, 2026
Patch available. Sources: github.
github Patch Available

Mjolnir 1.9.0 accepts commands from any room · Advisory · matrix-org/mjolnir · GitHub

https://github.com/matrix-org/mjolnir/security/advisories/GHSA-3jq6-xc85-m394
generic

Revert "forward mentions to management room" feature (#565) · matrix-org/mjolnir@d0ef527 · GitHub

https://github.com/matrix-org/mjolnir/commit/d0ef527a9e3eb45e17143d5295a64b775ccaa23d
generic

Forward mentions from bot to management room (#567) · matrix-org/mjolnir@b437fa1 · GitHub

https://github.com/matrix-org/mjolnir/commit/b437fa16b5425985715df861987c836affd51eea

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 123 total refreshes for this CVE.

  1. 2026-07-22 14:07 UTCEPSS rescore
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  3. 2026-07-21 15:24 UTCEPSS rescore
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  1. 2026-07-06 16:26 UTCEPSS rescore
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  22. 2026-06-22 14:25 UTCEPSS rescore
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  24. 2026-06-22 03:56 UTCOSV refresh
  25. 2026-06-21 14:56 UTCEPSS rescore
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  27. 2026-06-21 01:59 UTCEPSS rescore
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  31. 2026-06-18 17:52 UTCEPSS rescore
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  43. 2026-06-08 14:16 UTCEPSS rescore
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  55. 2026-06-03 22:39 UTCOSV refresh
  56. 2026-06-02 20:12 UTCEPSS rescore
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  74. 2026-05-26 13:43 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2025-24024?
CVE-2025-24024 is a critical vulnerability published on January 21, 2025. 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…
When was CVE-2025-24024 disclosed?
CVE-2025-24024 was first published in the National Vulnerability Database on January 21, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-24024 actively exploited?
CVE-2025-24024 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-24024?
CVE-2025-24024 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2025-24024?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-24024, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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