CVE-2026-30884
mdjnelson/moodle-mod_customcert is a Moodle plugin for creating dynamically generated certificates with complete customization via the web browser. Prior to versions 4.4.9 and 5.0.3, a teacher who holds `mod/customcert:manage` in any single course can read and silently overwrite certificate elements belonging to any other course in the Moodle installation. The `core_get_fragment` callback `editelement` and the `mod_customcert_save_element` web service both fail to verify that the supplied `elementid` belongs to the authorized context, enabling cross-course information disclosure and data tampering. Versions 4.4.9 and 5.0.3 fix the issue.
- Affected products
- Moodle, Moodle-Mod Customcert
- Fix
- Available
- CVSS 3.1
- 9.6 CRITICAL
- EPSS
- 0.2% (6th percentile)
- Weakness
- CWE-639
- NVD status
- Deferred
- Published
- 2026-03-18
No indexed exploits for CVE-2026-30884 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-30884 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.