Auth bypass in Moodle Project
CVE-2026-119556
Moodle 4.2.0 through 4.5.15, 5.0.0 through 5.0.11, 5.1.0 through 5.1.8, 5.2.0 through 5.2.4, and 5.3.0 contain a missing capability check in the core_grades_get_gradeitems web service that allows enrolled students to view hidden grade items. Authenticated course users can call the AJAX or mobile web service to list hidden grade item ids, names, and categories that the gradebook conceals from them.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Moodle Project — versions 5.3.0
Weakness classification (CWE)
References
- github.com/moodle/moodle/blob/v5.3.0/public/grade/classes/external/get_gradeite… (technical-description)
- abraxaslabs.tech/research/moodle-grades-gradeitems (third-party-advisory)
- github.com/moodle/moodle (product)
- www.vulncheck.com/advisories/moodle-through-5.3.0-5.2.4-5.1.8-5.0.11-and-4.5.15… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119556?
- CVE-2026-119556 is a medium-severity vulnerability in Moodle Project, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-10-30.
- How severe is CVE-2026-119556?
- Medium severity. CVSS v3 base score is 4.3 out of 10.