CVE-2026-30884 - Vulnerability Analysis
CriticalCVSS: 9.6Last Updated: March 18, 2026
mdjnelson/moodle-mod_customcert - Broken Access Control
Published: March 18, 2026Updated: March 18, 2026Remote Exploitable
Overview
mdjnelson/moodle-mod_customcert < 4.4.9 and < 5.0.3 contains a broken access control vulnerability caused by missing verification of element ownership in editelement callback and mod_customcert_save_element web service, letting teachers with mod/customcert:manage permission in one course read and overwrite certificate elements in other courses, exploit requires teacher role with mod/customcert:manage permission.
Severity & Score
Severity: Critical
CVSS Score: 9.6
Impact
Teachers can read and modify certificate elements across courses, leading to information disclosure and data tampering.
Mitigation
Upgrade to versions 4.4.9 or 5.0.3 or later.
References
Related Resources
Details
- CVE ID
- CVE-2026-30884
- Severity
- Critical
- CVSS Score
- 9.6
- Type
- broken_access_control
- Status
- new
CWE
- CWE-639
CVSS Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N