6.2

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2024-33996

CVE-2024-33996: Moodle broken access control when setting calendar event type

Incorrect validation of allowed event types in a calendar web service made it possible for some users to create events with types/audiences they did not have permission to publish to.

(GitHub Advisory)

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CVE-2024-33996

CVE-2024-33996:

6.2

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	>= 4.3.0, < 4.3.4	4.3.4
moodle/moodle	composer	>= 4.2.0, < 4.2.7	4.2.7
moodle/moodle	composer	< 4.1.10	4.1.10

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from improper input validation in calendar web services. Moodle's external API functions in externallib.php typically handle web service operations. The description specifically mentions calendar event type validation, which aligns with core_calendar_external class methods. The function submit_create_update_form is the primary entry point for event creation/updates via web services and would be responsible for validating event types. The CWE-20 classification confirms this is an input validation issue in the event type handling flow. While exact code isn't available, the pattern matches Moodle's architecture where form submission handlers in externallib.php validate user inputs for web services.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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