CVE-2024-43439: Moodle reflected XSS via H5P error message

medium Affects moodle/moodle. Feed 2026.10.29.1, updated 2026-10-28; published 2024-11-11; advisory modified 2025-04-24.

Moodle reflected XSS via H5P error message

Package: moodle/moodle Composer
Affected versions: <4.1.12 or >=4.2.0-beta and <4.2.9 or >=4.3.0-beta and <4.3.6 or >=4.4.0-beta and <4.4.2
Fixed in: 4.1.12, 4.2.9, 4.3.6, 4.4.2
Severity: medium CVSS 5.4
Exploitation: not on CISA KEV · EPSS 0% (28.7th percentile)
Published: 2024-11-11
Source: osv.dev

References

CWE-79

NVD record moodle/moodle advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2024-43425 high Moodle Remote Code Execution vulnerability same package: moodle/moodle
CVE-2022-35650 high Moodle Arbitrary file read when importing lesson questions same package: moodle/moodle
CVE-2021-36393 critical Moodle SQL Injection vulnerability same package: moodle/moodle
CVE-2022-0332 critical SQL injection in Moodle same package: moodle/moodle
CVE-2013-3630 medium Moodle Authenticated Spelling Binary Remote Code Execution same package: moodle/moodle
CVE-2018-1133 high Moodle calculated question type allows remote code execution by Question authors same package: moodle/moodle