CVE-2022-20784 MEDIUM

CVE-2022-20784: Cisco Web Security Appliance Filter Bypass Vulnerability

Vendor Cisco
Product Cisco Web Security Appliance (WSA)
Weakness CWE-20 · Input validation
Published April 6, 2022
Last update November 6, 2024
View on NVD All CVEs

CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

What the vulnerability does

01Description

A vulnerability in the Web-Based Reputation Score (WBRS) engine of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass established web request policies and access blocked content on an affected device. This vulnerability is due to incorrect handling of certain character combinations inserted into a URL. An attacker could exploit this vulnerability by sending crafted URLs to be processed by an affected device. A successful exploit could allow the attacker to bypass the web proxy and access web content that has been blocked by policy.

Key dates

02Disclosure timeline

April 6, 2022 CVE published
November 6, 2024 Record updated