CVE-2025-27933

EUVD-2025-7204
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
MattermostCNA
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 53%
Affected Products (NVD)
VendorProductVersion
mattermostmattermost_server
9.11.0 ≤
𝑥
< 9.11.9
mattermostmattermost_server
10.3.0 ≤
𝑥
< 10.3.4
mattermostmattermost_server
10.4.0 ≤
𝑥
< 10.4.3
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mattermostmattermost
10.4.0 ≤
𝑥
≤ 10.4.2
CNA
mattermostmattermost
10.3.0 ≤
𝑥
≤ 10.3.3
CNA
mattermostmattermost
9.11.0 ≤
𝑥
≤ 9.11.8
CNA
Common Weakness Enumeration
References
https://mattermost.com/security-updates