CVE-2011-4286

Moodle vulnerable to Cross-site Scripting

4.3 MediumFix available

Multiple cross-site scripting (XSS) vulnerabilities in the media-filter implementation in filter/mediaplugin/filter.php in Moodle 1.9.x before 1.9.11 and 2.0.x before 2.0.2 allow remote attackers to inject arbitrary web script or HTML via vectors involving (1) Flash Video (aka FLV) files and (2) YouTube videos.

Exploit likelihood

1.83%Up 0.7 points since Feb 4, 2022

What each source reports

NVD Score used 4.3

Record: CVE-2011-4286
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-4286
Updated: 2026-11-02

EUVDEUVD-2011-4225 No score

Record: EUVD-2011-4225
Updated: 2026-11-03

GitHub AdvisoriesGHSA-86v9-gqh9-8268 No score

Moodle vulnerable to Cross-site Scripting

Record: GHSA-86v9-gqh9-8268
Weakness: CWE-79
Updated: 2026-11-02

OSVGHSA-86v9-gqh9-8268 No score

Moodle vulnerable to Cross-site Scripting

Record: GHSA-86v9-gqh9-8268
Weakness: CWE-79
Updated: 2026-11-02

Affected products

moodle

Affected packages

Affected packages
Package	Affected	Fixed
`moodle/moodle` Packagist	1.9.0 up to 1.9.11	1.9.11
`moodle/moodle` Packagist	2.0.0 up to 2.0.2	2.0.2
`moodle` Debian:6.0 From an advisory covering 6 CVEs	before 1.9.9.dfsg2-2.1+squeeze1, plus listed versions 1.9.9.dfsg2-2.1	1.9.9.dfsg2-2.1+squeeze1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-4286 is a medium vulnerability (CVSS 4.3) in Moodle, published June 16, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.83%, the 79th percentile. Fixed in moodle/moodle 1.9.11.