Mattermost up to 10.8.0 Playbook Run authorization

Summaryinfo

A vulnerability marked as problematic has been reported in Mattermost up to 9.11.15/10.5.5/10.6.5/10.7.2/10.8.0. The affected element is an unknown function of the component Playbook Run Handler. This manipulation causes authorization. The identification of this vulnerability is CVE-2025-3227. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Mattermost up to 9.11.15/10.5.5/10.6.5/10.7.2/10.8.0 and classified as problematic. Affected by this vulnerability is an unknown code of the component Playbook Run Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality. The summary by CVE is:

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 enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.

The weakness was shared by Bharat. The advisory is shared at mattermost.com. This vulnerability is known as CVE-2025-3227 since 04/03/2025. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are 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-2025-18758). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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