CVE-2015-3174 Moodle does not set the RISK_XSS bit for graders

What is CVE-2015-3174?

CVE-2015-3174 is a low-severity cross-site scripting vulnerability in Moodle Moodle, published on 1 Jun 2015. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

mod/quiz/db/access.php in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 does not set the RISK_XSS bit for graders, which allows remote authenticated users to conduct cross-site scripting (XSS) attacks via crafted gradebook feedback during manual quiz grading.

Weakness: CWE-79

Which versions are affected by CVE-2015-3174?

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

Products include Moodle Moodle.

How do I fix CVE-2015-3174?

Upgrade moodle/moodle to a fixed version for your release line: 2.6.11, 2.7.8 or 2.8.6.

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-2015-3174 being exploited?

There is no known exploitation of CVE-2015-3174 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-6r7x-6q98-qcqp.