CVE-2022-20784CWE-20

Cisco Web Security Appliance Filter Bypass Vulnerability

Medium · published April 6, 2022

CVSS v3.1
5.8
EPSS
1%
Percentile
60.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00933 · 60.3th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2022-04-06T18:11Z
EPSS history
Timeline
  • 06 APR 18:11Z
    Cisco Web Security Appliance Filter Bypass Vulnerability
    cvelistv5