Check Point Advisories

Cross-Site Scripting Obfuscation Techniques (CVE-2020-11930; CVE-2021-26475; CVE-2021-26702; CVE-2021-26723; CVE-2021-39496; CVE-2022-46888; CVE-2023-23491; CVE-2023-24488; CVE-2023-26046; CVE-2023-28664; CVE-2023-28665; CVE-2023-28666; CVE-2023-4117)

Vulnerability
Protection

Check Point Reference:	CPAI-2023-0035
Date Published:	16 Jan 2023
Severity:	Critical
Last Updated:	Monday 21 April, 2025
Source:
Industry Reference:	CVE-2020-11930 CVE-2021-26475 CVE-2021-26702 CVE-2021-26723 CVE-2021-39496 CVE-2022-46888 CVE-2023-23491 CVE-2023-24488 CVE-2023-26046 CVE-2023-28664 CVE-2023-28665 CVE-2023-28666 CVE-2023-4117
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Known exploits could potentially bypass security products by using Cross-Site Scripting obfuscation techniques. Since the exploits are obfuscated they may not be detected by IDS and IPS systems, thus allowing attackers to successfully attack target machines.

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 Cross-Site Scripting Obfuscation Techniques 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: Web Server Enforcement Violation.
Attack Information: Cross-Site Scripting Obfuscation Techniques