What is the severity of CVE-2025-24839?

CVE-2025-24839 is considered a high-severity vulnerability as it allows unauthorized activation of AI responses.

How do I fix CVE-2025-24839?

To fix CVE-2025-24839, you should update Mattermost to the latest version, ensuring you are beyond versions 10.5.1, 10.4.3, and 9.11.9.

What are the affected versions in CVE-2025-24839?

CVE-2025-24839 affects Mattermost versions up to and including 10.5.1, 10.4.3, and 9.11.9.

What does CVE-2025-24839 allow attackers to do?

CVE-2025-24839 allows attackers to trigger AI responses without proper authorization through manipulated posts.

Is user access impacted by CVE-2025-24839?

Yes, CVE-2025-24839 affects user access by enabling unauthorized users to activate AI features.

Vulnerability/
CVE-2025-24839

low

3.1

CWE

863

16/4/2025

CVE-2025-24839: Unauthorized AI bot activation via Wrangler plugin

First published: Wed Apr 16 2025(Updated: )

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.

Credit: responsibledisclosure@mattermost.com

Affected Software	Affected Version	How to fix
Mattermost	<=10.5.1<=10.4.3<=9.11.9

Remedy

Update Mattermost to versions 10.6.0, 10.5.2, 10.4.4, 9.11.10 or higher.

Never miss a vulnerability like this again

Reference Links

https://mattermost.com/security-updates

Frequently Asked Questions

What is the severity of CVE-2025-24839?
CVE-2025-24839 is considered a high-severity vulnerability as it allows unauthorized activation of AI responses.
How do I fix CVE-2025-24839?
To fix CVE-2025-24839, you should update Mattermost to the latest version, ensuring you are beyond versions 10.5.1, 10.4.3, and 9.11.9.
What are the affected versions in CVE-2025-24839?
CVE-2025-24839 affects Mattermost versions up to and including 10.5.1, 10.4.3, and 9.11.9.
What does CVE-2025-24839 allow attackers to do?
CVE-2025-24839 allows attackers to trigger AI responses without proper authorization through manipulated posts.
Is user access impacted by CVE-2025-24839?
Yes, CVE-2025-24839 affects user access by enabling unauthorized users to activate AI features.

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collector/nvd-api
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canonical/mattermost

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