CVE-2022-40313 Moodle Stored Cross-site Scripting and page denial of service

What is CVE-2022-40313?

CVE-2022-40313 is a high-severity cross-site scripting vulnerability in Fedoraproject Extra Packages for Enterprise Linux, published on 30 Sep 2022. 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

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Weakness: CWE-79

Which versions are affected by CVE-2022-40313?

7 open source packages ship an affected version, including moodle/moodle and moodle. It affects 3 products.

Products include Fedoraproject Extra Packages for Enterprise Linux, Fedoraproject Fedora, Moodle Moodle.

How do I fix CVE-2022-40313?

Upgrade moodle/moodle to a fixed version for your release line: 3.11.10, 3.9.17 or 4.0.4.

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-2022-40313 being exploited?

There is no known exploitation of CVE-2022-40313 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Extra Packages for Enterprise Linux

• CVE-2023-34152 Command injection in ImageMagick Critical 9.8
• CVE-2022-4170 Code injection in rxvt-unicode Critical 9.8
• CVE-2022-40315 Moodle Minor SQL injection risk in admin user browsing Critical 9.8
• CVE-2022-45152 Moodle blind Server-Side Request Forgery (SSRF) vulnerability in LTI provider library Critical 9.1
• CVE-2022-24882 Server side NTLM does not properly check parameters in FreeRDP Critical 9.1

All Fedoraproject Extra Packages for Enterprise Linux vulnerabilities

Sources

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

Also known as BIT-moodle-2022-40313, GHSA-jqgr-gh62-jf53, UBUNTU-CVE-2022-40313.