UpHeron
All vulnerabilities

Servers and applications

CVE-2025-20033

Mattermost versions 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post types, which allows attackers to deny service to users with the sysconsole_read_plugins permission via creating a post with the custom_pl_notification type and specific props.

Severity
Medium 6.5
Published
9 Jan 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.11.6, 10.0.4, 10.1.4, 10.2.1
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • From 9.11.0 before 9.11.6
  • From 10.0.0 before 10.0.4
  • From 10.1.0 before 10.1.4
  • From 10.2.0 before 10.2.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-20033
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-20033