CVE-2025-24839

Unauthorized AI bot activation via Wrangler plugin

3.1 LowFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.23%Up 0.2 points since Apr 16, 2025

What each source reports

CVE List Score used 3.1

Unauthorized AI bot activation via Wrangler plugin

Record: CVE-2025-24839
CVSS 3.1: 3.1 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-863
Updated: 2026-11-02

EUVDEUVD-2025-11360 3.1

Record: EUVD-2025-11360
CVSS 3.1: 3.1 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-j639-m367-75cf 3.1

Mattermost Incorrect Authorization vulnerability

Record: GHSA-j639-m367-75cf
CVSS 3.1: 3.1 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-863
Updated: 2026-11-02

NVD 3.1

Record: CVE-2025-24839
CVSS 3.1: 3.1 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-863
Updated: 2026-11-02

OSV 3.1

Unauthorized AI bot activation via Wrangler plugin

Record: CVE-2025-24839
CVSS 3.1: 3.1 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-863
Updated: 2026-11-02

OSVGHSA-j639-m367-75cf 3.1

Mattermost Incorrect Authorization vulnerability

Record: GHSA-j639-m367-75cf
CVSS 3.1: 3.1 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-863
Updated: 2026-11-02

OSVGO-2025-3621 No score

Mattermost Incorrect Authorization vulnerability in github.com/mattermost/mattermost-server

Mattermost Incorrect Authorization vulnerability in github.com/mattermost/mattermost-server

Record: GO-2025-3621
Updated: 2026-11-02

OSVopenSUSE-SU-2025:15017-1 No score

govulncheck-vulndb-0.0.20250422T181640-1.1 on GA media

These are all security issues fixed in the govulncheck-vulndb-0.0.20250422T181640-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2025:15017-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/mattermost/mattermost/server/v8` Go	10.5.0 up to 10.5.2	10.5.2
`github.com/mattermost/mattermost/server/v8` Go	10.4.0 up to 10.4.4	10.4.4
`github.com/mattermost/mattermost/server/v8` Go	9.11.0 up to 9.11.10	9.11.10
`github.com/mattermost/mattermost/server/v8` Go	before 8.0.0-20250314142426-c049748b8863	8.0.0-20250314142426-c049748b8863
`github.com/mattermost/mattermost-server` Go	9.11.0+incompatible up to 9.11.10+incompatible, 10.4.0+incompatible up to 10.4.4+incompatible, 10.5.0+incompatible up to 10.5.2+incompatible	9.11.10+incompatible10.4.4+incompatible10.5.2+incompatible
`github.com/mattermost/mattermost-server/v5` Go	All versions	None known
`github.com/mattermost/mattermost-server/v6` Go	All versions	None known
`github.com/mattermost/mattermost/server/v8` Go	before 8.0.0-20250218121836-2b5275d87136	8.0.0-20250218121836-2b5275d87136
`govulncheck-vulndb` openSUSE:Tumbleweed From an advisory covering 23 CVEs	before 0.0.20250422T181640-1.1	0.0.20250422T181640-1.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-24839 is a low vulnerability (CVSS 3.1) in Mattermost, published April 16, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.23%, the 13th percentile. Fixed in github.com/mattermost/mattermost/server/v8 10.5.2.

References

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