Vulnerability · Published Oct 30, 2026 · Assigned by VulnCheck
CVE-2026-119555Moodle through 5.3.0, 5.2.4, 5.1.8, 5.0.11 and 4.5.15 Information Disclosure via core_grades_get_feedback
Medium 4.3
In plain English
A medium-severity authorization bypass via user-controlled key in moodle from Moodle Project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official description
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 an information disclosure vulnerability in the core_grades_get_feedback web service. The service lacks group-membership and enrolment checks, so non-editing teachers can iterate userid values to read other groups' grade feedback and users' names and identity fields such as email.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Moodle Project | moodle | 5.3.05.2.0 – through 5.2.45.1.0 – through 5.1.85.0.0 – through 5.0.114.2.0 – through 4.5.15 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
References
- https://github.com/moodle/moodle/blob/v5.3.0/public/grade/classes/external/get_feedback.php#L77-L96 technical-description
- https://abraxaslabs.tech/research/moodle-grades-feedback-idor third-party-advisory
- https://github.com/moodle/moodle product
- VulnCheck Advisory: Moodle through 5.3.0, 5.2.4, 5.1.8, 5.0.11 and 4.5.15 Information Disclosure via core_grades_get_feedback third-party-advisory