CVE-2025-24839

Name: CVE-2025-24839
Creator: NVD / NIST
Published: 2025-04-16T08:15:13.987+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2025-24839 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to prevent Wrangler posts from triggering AI responses. This vulnerability allows users without access to the AI bot to activate it by attaching the activate_ai override property to a post via the Wrangler plugin, provided both the AI and Wrangler plugins are enabled.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to prevent Wrangler posts from triggering AI responses. This vulnerability allows users without access to the AI bot to activate it by attaching the activate_ai override property to a post via the Wrangler plugin, provided both the AI and Wrangler plugins are enabled.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.18%

7.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	>= 9.11.0, < 9.11.10
Mattermost	Mattermost Server	>= 10.4.0, < 10.4.4
Mattermost	Mattermost Server	>= 10.5.0, < 10.5.2

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Apr 16, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-24839?

How severe is CVE-2025-24839?

CVE-2025-24839 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2025-24839?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-24839?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST