What’s Vulnerable › Vulnerabilities

CVE-2024-43439: Moodle: reflected xss via h5p error message

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-11 · updated 2026-06-17
• Weakness: CWE-79

Description

A flaw was found in moodle. H5P error messages require additional sanitizing to prevent a reflected cross-site scripting (XSS) risk.

Affected products

• Moodle: before 4.1.12; from 4.2.0 before 4.2.9; from 4.3.0 before 4.3.6; from 4.4.0 before 4.4.2 — fixed in 4.1.12, 4.2.9, 4.3.6, 4.4.2

How to fix

Upgrade to a fixed version: Moodle 4.1.12, 4.2.9, 4.3.6, 4.4.2. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=2304268
• https://moodle.org/mod/forum/discuss.php?d=461209

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