How severe is CVE-2025-24024?

CVE-2025-24024 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-24024 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-24024?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-24024 have an EU (EUVD) identifier?

Yes. CVE-2025-24024 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-3597.

When was CVE-2025-24024 published?

CVE-2025-24024 was published on 2025-01-21 and last updated on 2026-06-17.

CVE-2025-24024

CVE-2025-24024 is a critical-severity vulnerability with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-671.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-3597
Weakness: CWE-671
Published: 2025-01-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-24024?: 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.
How severe is CVE-2025-24024?: CVE-2025-24024 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-24024 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-24024?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-24024 have an EU (EUVD) identifier?: Yes. CVE-2025-24024 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-3597.
When was CVE-2025-24024 published?: CVE-2025-24024 was published on 2025-01-21 and last updated on 2026-06-17.

References

Other CWE-671 vulnerabilities

CVE-2018-13283 — High (CVSS 8.8): Lack of administrator control over security vulnerability in client.cgi in Synology SSL VPN Client before 1.2.5-0226…
CVE-2023-20115 — Medium (CVSS 5.4): A vulnerability in the SFTP server implementation for Cisco Nexus 3000 Series Switches and 9000 Series Switches in…
CVE-2022-29163 — Low (CVSS 3.5): Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions…

Browse all CWE-671 vulnerabilities →