Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint
Metrics
Affected Vendors & Products
References
Link | Providers |
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https://mattermost.com/security-updates |
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History
Thu, 16 Oct 2025 15:15:00 +0000
Type | Values Removed | Values Added |
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Metrics |
ssvc
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Thu, 16 Oct 2025 08:30:00 +0000
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Description | Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint | |
Title | Guest user can add unauthorized team users to private channels | |
Weaknesses | CWE-863 | |
References |
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Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2025-10-16T14:14:09.887Z
Reserved: 2025-09-16T08:41:00.850Z
Link: CVE-2025-10545

Updated: 2025-10-16T14:13:35.600Z

Status : Awaiting Analysis
Published: 2025-10-16T09:15:33.137
Modified: 2025-10-16T15:28:59.610
Link: CVE-2025-10545

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