CVE-2015-5337 Moodle XSS Vulnerability

What is CVE-2015-5337?

CVE-2015-5337 is a medium-severity cross-site scripting vulnerability in Moodle Moodle, published on 22 Feb 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Moodle through 2.6.11, 2.7.x before 2.7.11, 2.8.x before 2.8.9, and 2.9.x before 2.9.3 does not properly restrict the availability of Flowplayer, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted .swf file.

Weakness: CWE-79

Which versions are affected by CVE-2015-5337?

8 open source packages ship an affected version, including moodle/moodle. It affects 1 product.

Products include Moodle Moodle.

How do I fix CVE-2015-5337?

Upgrade moodle/moodle to a fixed version for your release line: 2.7.11, 2.8.9 or 2.9.3.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2015-5337 being exploited?

There is no known exploitation of CVE-2015-5337 in the wild and no public exploit code.

Other vulnerabilities in Moodle Moodle

• CVE-2006-4935 File upload in n/a Critical 10.0
• CVE-2006-4936 Moodle does not properly validate module instance id Critical 10.0
• CVE-2004-2233 Unknown "front page vulnerability with Moodle servers" for Moodle before 1.3.2 has unknown impact and attack vectors. Critical 10.0
• CVE-2004-2235 Cross-site scripting in n/a Critical 10.0
• CVE-2004-2236 Other in n/a Critical 10.0

All Moodle Moodle vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-2hw6-6rgf-726v.