CVE-2020-25631: Moodle

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

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.

Affected products

• Moodle Moodle: from 3.7.0, before 3.7.8 (fixed in 3.7.8); from 3.8.0, before 3.8.5 (fixed in 3.8.5); from 3.9.0, before 3.9.2 (fixed in 3.9.2)

Published 2020-12-08. Last modified 2026-06-17.