CVE-2026-53738

Copy & Delete Posts through 1.5.4 lets any plugin-enabled non-admin role invoke every operation in the cdpactionhandling AJAX handler. Attackers with an enabled role can delete posts or overwrite plugin settings via the f parameter, bypassing per-function capability checks...

PT-2024-18443 · Mattermost · Mattermost

Name of the Vulnerable Software and Affected Versions: Mattermost versions 8.1.x through 8.1.8 Mattermost versions 9.4.x through 9.4.1 Description: A race condition allows an authenticated attacker to gain unauthorized access to individual posts' contents via carefully timed post creation while...

PT-2023-17235 · Unknown · Mattermost

Name of the Vulnerable Software and Affected Versions: Mattermost affected versions not specified Description: When running in a High Availability configuration, Mattermost fails to sanitize some of the user updated and post deleted events broadcast to all users, leading to disclosure of sensitiv...