CVE-2022-50943: Moodle LMS 4.0 Cross-Site Scripting via course search.php

Published May 10, 2026

Updated

Moodle LMS 4.0 contains a cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting payloads through the search parameter. Attackers can inject JavaScript code via the search field in course/search.php to execute arbitrary scripts in users' browsers and steal session cookies.

Affected Software

1 affected component

Moodle Moodle LMS=4.0

Event History

May 10, 2026

CVE Published

via MITRE·12:12 PM

Data Sourced

via MITRE·12:12 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·01:16 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2022-50943?

CVE-2022-50943 is classified as a medium severity vulnerability due to its potential for cross-site scripting attacks.

How do I fix CVE-2022-50943?

To fix CVE-2022-50943, update your Moodle LMS to version 4.0.1 or later where the vulnerability is patched.

Who is affected by CVE-2022-50943?

CVE-2022-50943 affects users of Moodle LMS version 4.0.

What type of vulnerability is CVE-2022-50943?

CVE-2022-50943 is a cross-site scripting (XSS) vulnerability enabling attackers to inject malicious scripts.

Can CVE-2022-50943 be exploited without authentication?

Yes, CVE-2022-50943 can be exploited by unauthenticated attackers through the search parameter.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

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