CVE-2017-18892 — Improper Encoding or Escaping of Output in Mattermost Mattermost-server

CWE-116 — Improper Encoding or Escaping of Output5 documents4 sources
Severity
6.1MEDIUMNVD
EPSS
0.2%
top 52.38%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Github.com Mattermost Mattermost-serverMattermost Server
Timeline
PublishedJun 19
Latest updateJan 23

Description

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. E-mail templates can have a field in which HTML content is not neutralized.

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_server4.1.0 — 4.1.1+2

🔴Vulnerability Details

4
OSV
Mattermost Server does not neutralize HTML content in an Email template field in github.com/mattermost/mattermost-server↗2026-01-23
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OSV
Mattermost Server does not neutralize HTML content in an Email template field↗2022-05-24
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GHSA
Mattermost Server does not neutralize HTML content in an Email template field↗2022-05-24
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CVEList
CVE-2017-18892: An issue was discovered in Mattermost Server before 4↗2020-06-19
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CVE-2017-18892 — MEDIUM severity | cvebase