Moodle: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CVE-2023-23921)

Moodle: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CVE-2023-23921)

Severity

6

CVSS

(AV:N/AC:M/Au:N/C:P/I:P/A:N)

Published

02/17/2023

Created

03/03/2023

Added

03/02/2023

Modified

01/28/2025

Description

The vulnerability was found Moodle which exists due to insufficient sanitization of user-supplied data in some returnurl parameters. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website. This flaw allows a remote attacker to perform cross-site scripting (XSS) attacks.

Solution(s)

• moodle-upgrade-3_11_12
• moodle-upgrade-3_9_19
• moodle-upgrade-4_0_6

References

• https://attackerkb.com/topics/cve-2023-23921
• CVE - 2023-23921
• http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-76810
• https://bugzilla.redhat.com/show_bug.cgi?id=2162526
• https://moodle.org/mod/forum/discuss.php?d=443272#p1782021