CVE-2021-36568 Moodle Cross-site Scripting vulnerability

What is CVE-2021-36568?

CVE-2021-36568 is a medium-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 13 Sep 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

In certain Moodle products after creating a course, it is possible to add in a arbitrary "Topic" a resource, in this case a "Database" with the type "Text" where its values "Field name" and "Field description" are vulnerable to Cross Site Scripting Stored(XSS). This affects Moodle 3.11 and Moodle 3.10.4 and Moodle 3.9.7.

Weakness: CWE-79

Which versions are affected by CVE-2021-36568?

7 open source packages ship an affected version, including moodle/moodle and moodle. It affects 2 products.

Products include Fedoraproject Fedora, Moodle Moodle.

How do I fix CVE-2021-36568?

Upgrade moodle/moodle to 3.11.10 or later.

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-2021-36568 being exploited?

There is no known exploitation of CVE-2021-36568 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as BIT-moodle-2021-36568, GHSA-fm6m-fg23-67jq, UBUNTU-CVE-2021-36568.