๐Ÿ›ก๏ธ CVE-2025-53021
๐ŸŸก CVSS 5.0 โ€” Medium โœ… No Known Exploit OSV
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 5.0
CVSS Vector N/A
CWE N/A
Public Exploit โœ… No
Source OSV
Published 2025-07-10
Updated 2026-06-15
Modified 2025-08-20
Fix URL N/A

Affected Packages

Software From version Fixed in
moodle โ€” โ€”
moodle/moodle 3.0.0 4.0.0

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