CVE-2023-5542 Moodle: students can view other users in "only see own membership" groups

What is CVE-2023-5542?

CVE-2023-5542 is a low-severity missing authorization vulnerability in Fedoraproject Extra Packages for Enterprise Linux, published on 9 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Students in "Only see own membership" groups could see other students in the group, which should be hidden.

Weakness: CWE-668, CWE-284

Which versions are affected by CVE-2023-5542?

3 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-2023-5542?

Upgrade moodle/moodle to 4.3.0-rc2 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-5542 being exploited?

There is no known exploitation of CVE-2023-5542 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-2023-5542, GHSA-8mm2-m2gp-c6x2, UBUNTU-CVE-2023-5542.