CVE-2017-18907 — Cross-site Scripting in Mattermost Mattermost-server

CWE-79 — Cross-site Scripting5 documents4 sources
Severity
6.1MEDIUMNVD
EPSS
0.4%
top 41.86%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Github.com Mattermost Mattermost-serverMattermost Server
Timeline
PublishedJun 19
Latest updateFeb 17

Description

An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. XSS could occur via a channel header.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages2 packages

▶NVDmattermost/mattermost_server3.10.0 — 3.10.2+1

🔴Vulnerability Details

4
OSV
Mattermost Server vulnerable to XSS through channel headers in github.com/mattermost/mattermost-server↗2026-02-17
▶
OSV
Mattermost Server vulnerable to XSS through channel headers↗2022-05-24
▶
GHSA
Mattermost Server vulnerable to XSS through channel headers↗2022-05-24
▶
CVEList
CVE-2017-18907: An issue was discovered in Mattermost Server before 4↗2020-06-19
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CVE-2017-18907 — Cross-site Scripting | cvebase