CVE-2023-5546 Moodle: stored xss in quiz grading report via user id number

What is CVE-2023-5546?

CVE-2023-5546 is a medium-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 9 Nov 2023. 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

ID numbers displayed in the quiz grading report required additional sanitizing to prevent a stored XSS risk.

Weakness: CWE-79

Which versions are affected by CVE-2023-5546?

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

Products include Fedoraproject Fedora, Moodle Moodle, Redhat Enterprise Linux.

How do I fix CVE-2023-5546?

Upgrade moodle/moodle to 4.3.0-rc2 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-2023-5546 being exploited?

There is no known exploitation of CVE-2023-5546 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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-2023-5546, GHSA-9724-h8p7-r3jv, UBUNTU-CVE-2023-5546.