Mattermost up to 9.11.9/10.4.3/10.5.1 Wrangler Plugin activate_ai authorization

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Mattermost up to 9.11.9/10.4.3/10.5.1. This vulnerability affects unknown code of the component Wrangler Plugin. Such manipulation of the argument activate_ai leads to authorization. This vulnerability is referenced as CVE-2025-24839. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Mattermost up to 9.11.9/10.4.3/10.5.1. It has been rated as problematic. Affected by this issue is an unknown part of the component Wrangler Plugin. The manipulation of the argument activate_ai with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. Impacted is integrity. CVE summarizes:

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.

The weakness was published by Juho Forsén. The advisory is shared for download at mattermost.com. This vulnerability is handled as CVE-2025-24839 since 04/08/2025. The exploitation is known to be difficult. The attack may be launched remotely. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 234795 (Mattermost Server 9.11.x < 9.11.10 / 10.4.x < 10.4.4 / 10.5.x < 10.5.2 / 10.6.0 (MMSA-2024-00410)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.11.10, 10.4.4, 10.5.2 or 10.6.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (234795). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CNA Base Score: 3.1
CNA Vector (Mattermost): 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 234795
Nessus Name: Mattermost Server 9.11.x < 9.11.10 / 10.4.x < 10.4.4 / 10.5.x < 10.5.2 / 10.6.0 (MMSA-2024-00410)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost 9.11.10/10.4.4/10.5.2/10.6.0

Timelineinfo

04/08/2025 🔍
04/16/2025 +8 days 🔍
04/16/2025 +0 days 🔍
10/02/2025 +169 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: Juho Forsén
Status: Confirmed

CVE: CVE-2025-24839 (🔍)
GCVE (CVE): GCVE-0-2025-24839
GCVE (VulDB): GCVE-100-305000

Entryinfo

Created: 04/16/2025 14:12
Updated: 10/02/2025 17:01
Changes: 04/16/2025 14:12 (65), 04/24/2025 21:51 (2), 10/02/2025 17:01 (12)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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