Vulnerability in Moodle Project moodle

[ Description ]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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund1 Nov 2026WID-SEC-2026-4274

  Moodle: Multiple vulnerabilities Translated from German

  CVE-2026-119554CVE-2026-119555CVE-2026-119553+1 more CVEs

[ References ]References

• abraxaslabs.tech/research/moodle-grades-feedback-idor
• github.com/moodle/moodle
• github.com/moodle/moodle/blob/v5.3.0/public/grade/classes/external/get_feedback.php
• www.vulncheck.com/advisories/moodle-through-5.3.0-5.2.4-5.1.8-5.0.11-and-4.5.15-informa…