CVE-2025-27933

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
NISTNIST
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
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
CISA-ADPADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 4%
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
Common Weakness Enumeration
References
https://mattermost.com/security-updates