CVE-2019-20867

MEDIUM 5.3CVE-2019-20867 · Published 19/06/2020 · updated 17/06/2026

In short

CVE-2019-20867 is a MEDIUM (CVSS 5.3) vulnerability affecting mattermost server (mattermost).
Chance of exploitation in the next 30 days (EPSS): 0.81%, higher than 57.0% of all vulnerabilities.
Fix: update to 5.11.0 or later.

Package	Affected versions	Patched versions
mattermost server mattermost	`< 5.11.0`	`5.11.0`

An issue was discovered in Mattermost Server before 5.11.0. An attacker can interfere with a channel's post loading via one crafted post.

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Package

Affected versions

Patched versions

< 5.11.0

5.11.0

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