4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-3640

CVE-2025-3640: Moodle has an IDOR in web service which allows users enrolled in a course to access some details of other users

A flaw was found in Moodle. Insufficient capability checks made it possible for a user enrolled in a course to access some details, such as the full name and profile image URL, of other users they did not have permission to access.

(GitHub Advisory)

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CVE-2025-3640

CVE-2025-3640:

4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
moodle/moodle	composer	< 4.1.18	4.1.18
moodle/moodle	composer	>= 4.3.0-beta, < 4.3.12	4.3.12
moodle/moodle	composer	>= 4.4.0-beta, < 4.4.8	4.4.8
moodle/moodle	composer	>= 4.5.0-beta, < 4.5.4	4.5.4

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability description states that insufficient capability checks allowed users to access details of other users. The provided commit 64a4311266cbe9a9a942c836931bef224018b77d directly addresses this by adding a capability check (course_require_view_participants) within the get_enrolled_users_by_cmid function in course/externallib.php. The function's purpose is to retrieve enrolled users, which aligns with the vulnerability's impact. The test file course/tests/externallib_test.php confirms this by adding a test case that expects a required_capability_exception when the moodle/course:viewparticipants capability is missing, and then calls core_course_external::get_enrolled_users_by_cmid. This clearly indicates that core_course_external::get_enrolled_users_by_cmid was the function lacking the necessary authorization check, making it the vulnerable function.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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