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4.3

An issue was discovered in Mattermost Server before 5.8.0, when Town Square is set to Read-Only. Users can pin or unpin a post.

CVE-2019-20883 · published 6 years ago
Summary

An issue was discovered in Mattermost Server before 5.8.0, when Town Square is set to Read-Only. Users can pin or unpin a post.

What to do
  • Update mattermost mattermost_server to version 5.8.0 or later.
Affected software
VendorProductAffected versions
mattermost mattermost_server < 5.8.0
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Original advisory text
An issue was discovered in Mattermost Server before 5.8.0, when Town Square is set to Read-Only. Users can pin or unpin a post.
An issue was discovered in Mattermost Server before 5.8.0, when Town Square is set to Read-Only. Users can pin or unpin a post.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
4.3 Medium
Exploitation
<1% chance of attack within 30 days
Timeline
Published19 Jun 2020
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2019-20883 · NVD
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