CVE-2020-25631 Moodle Cross-site Scripting (XSS)
An attacker can inject JavaScript into book chapter titles in Moodle, potentially leading to code execution or account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-25631?
CVE-2020-25631 is a medium-severity cross-site scripting vulnerability in Moodle Moodle, published on 8 Dec 2020. 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
A vulnerability was found in Moodle 3.9 to 3.9.1, 3.8 to 3.8.4 and 3.7 to 3.7.7 where it was possible to include JavaScript in a book's chapter title, which was not escaped on the "Add new chapter" page. This is fixed in 3.9.2, 3.8.5 and 3.7.8.
Weakness: CWE-79
Which versions are affected by CVE-2020-25631?
7 open source packages ship an affected version, including moodle/moodle and moodle. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
moodle/moodle Packagist | From 3.7 | 3.7.8 |
moodle/moodle Packagist | From 3.7 | 3.7.8 |
moodle/moodle Packagist | From 3.8 | 3.8.5 |
moodle/moodle Packagist | From 3.8 | 3.8.5 |
moodle/moodle Packagist | From 3.9 | 3.9.2 |
moodle/moodle Packagist | From 3.9 | 3.9.2 |
1 more packages
moodle Bitnami | From 3.7.0 | 3.7.8, 3.8.5, 3.9.2 |
Products include Moodle Moodle.
How do I fix CVE-2020-25631?
Upgrade moodle/moodle to a fixed version for your release line: 3.7.8, 3.8.5 or 3.9.2.
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-2020-25631 being exploited?
There is no known exploitation of CVE-2020-25631 in the wild and no public exploit code.
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-2020-25631, GHSA-4w4j-9533-82qg, UBUNTU-CVE-2020-25631.