CVE-2017-18886 — Incorrect Permission Assignment in Mattermost Mattermost-server

CWE-732 — Incorrect Permission Assignment5 documents4 sources
Severity
8.8HIGHNVD
EPSS
0.3%
top 43.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Github.com Mattermost Mattermost-serverMattermost Server
Timeline
PublishedJun 19
Latest updateDec 15

Description

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows a bypass of restrictions on use of slash commands.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages2 packages

▶NVDmattermost/mattermost_server4.2.0 — 4.2.1+2
▶Gogithub.com/mattermost_mattermost-server4.2.0-rc1+incompatible — 4.2.1+incompatible+5

🔴Vulnerability Details

4
OSV
Mattermost Server does not properly restrict use of slash commands in github.com/mattermost/mattermost-server↗2025-12-15
▶
OSV
Mattermost Server does not properly restrict use of slash commands↗2022-05-24
▶
GHSA
Mattermost Server does not properly restrict use of slash commands↗2022-05-24
▶
CVEList
CVE-2017-18886: An issue was discovered in Mattermost Server before 4↗2020-06-19
▶
CVE-2017-18886 — Incorrect Permission Assignment | cvebase