Mattermost up to 10.8.0 Run Metadata API Endpoint authorization

Summaryinfo

A vulnerability categorized as problematic has been discovered in Mattermost up to 9.11.15/10.5.5/10.6.5/10.7.2/10.8.0. This affects an unknown part of the component Run Metadata API Endpoint. The manipulation results in authorization. This vulnerability was named CVE-2025-47871. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost up to 9.11.15/10.5.5/10.6.5/10.7.2/10.8.0. It has been classified as problematic. Affected is an unknown functionality of the component Run Metadata API Endpoint. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.

The weakness was presented by Leandro Chaves. The advisory is shared for download at mattermost.com. This vulnerability is traded as CVE-2025-47871 since 05/23/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 9.11.16, 10.5.6, 10.6.6, 10.7.3, 10.8.1 or 10.9.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-19558). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Groupware Software

Name

• Mattermost

Version

• 9.11.0
• 9.11.1
• 9.11.2
• 9.11.3
• 9.11.4
• 9.11.5
• 9.11.6
• 9.11.7
• 9.11.8
• 9.11.9
• 9.11.10
• 9.11.11
• 9.11.12
• 9.11.13
• 9.11.14
• 9.11.15
• 10.0
• 10.1
• 10.2
• 10.3
• 10.4
• 10.5
• 10.5.0
• 10.5.1
• 10.5.2
• 10.5.3
• 10.5.4
• 10.5.5
• 10.6
• 10.6.0
• 10.6.1
• 10.6.2
• 10.6.3
• 10.6.4
• 10.6.5
• 10.7
• 10.7.0
• 10.7.1
• 10.7.2
• 10.8.0

License

• open-source

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Entryinfo

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

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