Description

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.

INFO

Published Date :

2025-06-24T00:00:00.000Z

Last Modified :

2025-06-24T19:46:49.641Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2025-53021 vulnerability.

Vendors Products
Moodle
  • Moodle
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-53021.

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact