Back to Database
Status published
Low
CVE-2024-39837
Malicious remote can create arbitrary channels
Vulnerability Description
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2024-39837
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Juho Forsén
References
More from Mattermost
View All →CVE-2025-9084
Open redirect in OAuth login
Low
3.1
CVE-2025-9081
IDOR in board file download allows any user to download any file by UUID
Low
3.1
CVE-2025-9079
Admin RCE via prepackaged plugins by way of misconfigured imports directory
High
8
CVE-2025-9078
Weak cache keys lead to post IDOR and link preview poisoning
Medium
4.3
CVE-2025-9076
Mattermost Server exposes sensitive user credentials during shared channel membership synchronization
Medium
6.5
Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
9.9.0, 9.5.0, 9.10.0, 9.9.1, 9.5.7
Timeline
Official Publish:
August 1st, 2024
Last Modified:
August 1st, 2024
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N