CVE-2018-10891

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-07-10 · updated 2026-06-17
Weakness: CWE-20

Description

A flaw was found in moodle before versions 3.5.1, 3.4.4, 3.3.7, 3.1.13. When a quiz question bank is imported, it was possible for the question preview that is displayed to execute JavaScript that is written into the question bank.

Affected products

Moodle: from 3.1 before 3.1.13; from 3.3 before 3.3.7; from 3.4 before 3.4.4; from 3.5 before 3.5.1 — fixed in 3.1.13, 3.3.7, 3.4.4, 3.5.1

How to fix

Upgrade to a fixed version: Moodle 3.1.13, 3.3.7, 3.4.4, 3.5.1. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/104739
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10891
https://moodle.org/mod/forum/discuss.php?d=373371
http://www.securityfocus.com/bid/104739
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10891
https://moodle.org/mod/forum/discuss.php?d=373371

Get alerted when CVE-2018-10891 or the next vulnerability affects your stack