Moodle: reflected xss via h5p error message

published 2024-11-11 23 mo ago modified 2026-09-08 2 mo ago also BIT-moodle-2024-43439 , EUVD-2024-40278 , GHSA-hjgc-jxjc-8v9j

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits: 0; none known

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

Patch / fix

fixed in 3 links 1

packagist moodle/moodle 4.1.12, 4.2.9, 4.3.6, 4.4.2
bitnami moodle 4.1.12, 4.2.9, 4.3.6, 4.4.2
moodle moodle 4.1.12, 4.2.9, 4.4.2

github.com/moodle/moodle@c7d9026 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-43439 updated 2025-11-21 cvss 5.4

moodle: Reflected XSS via H5P error message

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 23 mo ago (2024-11-12)

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
GitHub	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
OSV	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	moodle/moodle	<4.1.12 >=4.2.0-beta, <4.2.9 >=4.3.0-beta, <4.3.6 >=4.4.0-beta, <4.4.2	4.1.12 4.2.9 4.3.6 4.4.2
bitnami	moodle	<4.1.12 >=4.2.0, <4.2.9 >=4.3.0, <4.3.6 >=4.4.0, <4.4.2	4.1.12 4.2.9 4.3.6 4.4.2

Affected products

moodle moodle

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /moodle/moodle/commit/c7d9026715a107ee16b9f9b2134ed4e6f667af99
web
moodle.org /mod/forum/discuss.php?d=461209
web, vendor-advisory, advisory
bugzilla.redhat.com /show_bug.cgi?id=2304268
issue-tracking, web, permissions-required
nvd.nist.gov /vuln/detail/CVE-2024-43439
advisory, web
github.com /moodle/moodle
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary