Vulnerability Monitor

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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 attacker's. Successful exploitation results in full account takeover. According to the Moodle Releases page, "Bug fixes for security issues in 3.11.x ended 11 December 2023." NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Published

2025-06-24T20:15:26.867

Last Modified

2025-07-09T15:23:31.237

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 4.2 (MEDIUM)

Weaknesses
  • Type: Primary
    CWE-384
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application moodle moodle ≤ 3.11.18 Yes
References