CVE-2017-18875 — Incorrect Permission Assignment in Mattermost Mattermost-server

CWE-732 — Incorrect Permission AssignmentCWE-22 — Path Traversal5 documents4 sources
Severity
4.9MEDIUMNVD
EPSS
0.2%
top 60.03%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Github.com Mattermost Mattermost-serverMattermost Server
Timeline
PublishedJun 19
Latest updateDec 8

Description

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can create arbitrary files.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:NExploitability: 1.2 | Impact: 3.6

Affected Packages2 packages

▶NVDmattermost/mattermost_server4.2.0 — 4.2.1+2
▶Gogithub.com/mattermost_mattermost-server4.3.0-rc1+incompatible — 4.3.0+incompatible+3

🔴Vulnerability Details

4
OSV
Mattermost Server does not prevent System Admin from arbitrary file creation in github.com/mattermost/mattermost-server↗2025-12-08
▶
OSV
Mattermost Server does not prevent System Admin from arbitrary file creation↗2022-05-24
▶
GHSA
Mattermost Server does not prevent System Admin from arbitrary file creation↗2022-05-24
▶
CVEList
CVE-2017-18875: An issue was discovered in Mattermost Server before 4↗2020-06-19
▶
CVE-2017-18875 — Incorrect Permission Assignment | cvebase