CVE-2025-20088 — Improper Validation of Specified Type of Input in Mattermost Mattermost-server

CWE-1287 — Improper Validation of Specified Type of Input5 documents4 sources
Severity
6.5MEDIUMNVD
EPSS
0.4%
top 36.44%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedJan 15
Latest updateJan 16

Description

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶NVDmattermost/mattermost_server9.11.0 — 9.11.6+3
▶Gogithub.com/mattermost_mattermost-server9.11.0+incompatible — 9.11.6+incompatible+3
▶CVEListV5mattermost/mattermost9.11.0 — 9.11.5+3

🔴Vulnerability Details

4
OSV
Mattermost fails to properly validate post props in github.com/mattermost/mattermost-server↗2025-01-16
▶
CVEList
Insufficient Input Validation on Post Props↗2025-01-15
▶
GHSA
Mattermost fails to properly validate post props↗2025-01-15
▶
OSV
Mattermost fails to properly validate post props↗2025-01-15
▶
CVE-2025-20088 — MEDIUM severity | cvebase