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CVE-2025-53021

nvd nist
Published: Jun 24, 2025Modified: Jun 17, 2026

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4.2
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Exploitability: 1.6 / Impact: 2.5
Source: MITRE (Secondary)

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.

Affected (1)

Products: Moodle: Moodle
Moodle
1 product
Moodle
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Moodle
From 3.0.0 to 3.11.18

Related CWEs

CWE-384
Session Fixation
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.

References (3)

Source: cve@mitre.org
Product
Source: cve@mitre.org
Product
Source: cve@mitre.org
Third Party Advisory

Timeline

No history available yet.