Moodle core_grades_get_feedback Info Disclosure (pre5.3.0)
CVE-2026-119555 Published on October 30, 2026
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
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.
Vulnerability Analysis
CVE-2026-119555 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-119555 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-119555
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Affected Versions
Moodle Project moodle:- Version 5.3.0 is affected.
- Version 5.2.0, <= 5.2.4 is affected.
- Version 5.1.0, <= 5.1.8 is affected.
- Version 5.0.0, <= 5.0.11 is affected.
- Version 4.2.0, <= 4.5.15 is affected.