Session Fixation

Overview moodle/moodle is a learning platform. Affected versions of this package are vulnerable to Session Fixation via the sesskey parameter. An attacker can gain unauthorized access to another user's session by obtaining and reusing the sesskey within the OAuth2 login flow, resulting in the...

UBUNTU-CVE-2025-53021

A session fixation vulnerability in Moodle 3.x through 3.11.18 allows unauthenticated attackers to hijack user sessions via the sesskey parameter. The sesskey can be obtained without authentication and reused within the OAuth2 login flow, resulting in the victim's session being linked to the...