Check Point Advisories

Flarum Core Cross-Site Scripting (CVE-2021-32671)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1467
Date Published:	15 Dec 2022
Severity:	Critical
Last Updated:	Thursday 15 December, 2022
Source:
Industry Reference:	CVE-2021-32671
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Flarum 1.0.0-1.0.1
Vulnerability Description	A cross-site scripting vulnerability exists in the Flarum Core application. The vulnerability is due to incorrect input sanitization. A successful attack may result in execution of script code.

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 Flarum Core Cross-Site Scripting (CVE-2021-32671) 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: Application Servers Protection Violation.
Attack Information: Flarum Core Cross-Site Scripting (CVE-2021-32671)