CVE-2025-0503

EUVD-2025-1723
Mattermost versions 9.11.x <= 9.11.6 fail to filter out DMs from the deleted channels endpoint which allows an attacker to infer user IDs and other metadata from deleted DMs if someone had manually marked DMs as deleted in the database.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
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
Base Score
CVSS 3.x
EPSS Score
Percentile: 58%
Affected Products (NVD)
VendorProductVersion
mattermostmattermost_server
9.11.0 ≤
𝑥
< 9.11.7
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mattermostmattermost
9.11.0 ≤
𝑥
≤ 9.11.6
CNA
Common Weakness Enumeration
References
https://mattermost.com/security-updates