CVE-2025-4128

Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
3.1 LOW
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
MattermostCNA
3.1 LOW
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA-ADPADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
VendorProductVersion
mattermostmattermost_server
9.11.0 ≤
𝑥
< 9.11.14
mattermostmattermost_server
10.5.0 ≤
𝑥
< 10.5.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://mattermost.com/security-updates