Check Point Advisories

Joomla! Cross-Site Scripting (CVE-2021-23124)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1283
Date Published:	20 Sep 2022
Severity:	Medium
Last Updated:	Monday 09 January, 2023
Source:
Industry Reference:	CVE-2021-23124
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Joomla! CMS 3.9.0 through 3.9.23
Vulnerability Description	A stored cross-site scripting vulnerability exists in Joomla! CMS Core. The vulnerability is due to improper validation of the title parameter in the mod_breadcrumbs module. A remote, authenticated attacker can exploit the vulnerability by sending a crafted request to the server.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Joomla! Cross-Site Scripting (CVE-2021-23124) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: ICMP Protocol Violation.
Attack Information: Joomla! Cross-Site Scripting (CVE-2021-23124)