Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint
References
| Link | Resource |
|---|---|
| https://mattermost.com/security-updates | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
17 Nov 2025, 18:05
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://mattermost.com/security-updates - Vendor Advisory | |
| CPE | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| First Time |
Mattermost
Mattermost mattermost Server |
13 Nov 2025, 18:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-11-13 18:15
Updated : 2025-11-17 18:05
NVD link : CVE-2025-11777
Mitre link : CVE-2025-11777
CVE.ORG link : CVE-2025-11777
JSON object : View
Products Affected
mattermost
- mattermost_server
CWE
CWE-863
Incorrect Authorization