Moodle XSS Vulnerability

published 2016-11-04 10 y ago modified 2026-06-17 4 mo ago also GHSA-7ghm-fp7p-qvjq , EUVD-2022-3000

cvss: 6.1; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

Cross-site scripting (XSS) vulnerabilities in Moodle CMS on or before 3.1.2 allow remote attackers to inject arbitrary web script or HTML via the s_additionalhtmlhead, s_additionalhtmltopofbody, and s_additionalhtmlfooter parameters.

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-2016-9188 updated 2026-01-13

moodle: Multiple vulnerabilities in 3.1.2 and before

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

Exploit prediction

1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

packetstormsecurity.com https://packetstormsecurity.com/files/139466/Moodle-CMS-3.1.2-Cross-Site-Scripting-File-Upload.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.1	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub	3.0	6.1	CVSS:3.0/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	>=2.0.1, <=3.2.1	no fix listed

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

packetstormsecurity.com /files/139466/Moodle-CMS-3.1.2-Cross-Site-Scripting-File-Upload.html
web, exploit, third-party-advisory, vdb-entry
securityfocus.com /bid/94189
vdb-entry, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2016-9188
advisory
web.archive.org /web/20210123190812/http://www.securityfocus.com/bid/94189
web

Sources

CVE List CVE-2016-9188
GitHub Advisory GHSA-7ghm-fp7p-qvjq
NVD CVE-2016-9188

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