CVE-2021-36394 Moodle Session Fixation vulnerability
Attackers can execute arbitrary code via the Shibboleth authentication plugin in Moodle, requiring this specific authentication method to be enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-36394?
CVE-2021-36394 is a critical code injection vulnerability in Moodle Moodle, published on 6 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Moodle, a remote code execution risk was identified in the Shibboleth authentication plugin.
Which versions are affected by CVE-2021-36394?
7 open source packages ship an affected version, including moodle/moodle and moodle. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
moodle/moodle Packagist | All versions | 3.9.8 |
moodle/moodle Packagist | All versions | 3.9.8 |
moodle/moodle Packagist | From 3.10.0-beta | 3.10.5 |
moodle/moodle Packagist | From 3.10.0-beta | 3.10.5 |
moodle/moodle Packagist | From 3.11.0-beta | 3.11.1 |
moodle/moodle Packagist | From 3.11.0-beta | 3.11.1 |
1 more packages
moodle Bitnami | All versions | 3.9.8, 3.10.5, 3.11.1 |
Products include Moodle Moodle.
How do I fix CVE-2021-36394?
Upgrade moodle/moodle to a fixed version for your release line: 3.9.8, 3.10.5 or 3.11.1.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-36394 being exploited?
There is no known exploitation of CVE-2021-36394 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Other vulnerabilities in Moodle Moodle
- CVE-2006-4935 File upload in n/a
- CVE-2006-4936 Moodle does not properly validate module instance id
- CVE-2004-2233 Unknown "front page vulnerability with Moodle servers" for Moodle before 1.3.2 has unknown impact and attack vectors.
- CVE-2004-2235 Cross-site scripting in n/a
- CVE-2004-2236 Other in n/a
Sources
Also known as BIT-moodle-2021-36394, GHSA-2563-fp9c-mgm8, UBUNTU-CVE-2021-36394.