CVE-2022-20784

Cisco Web Security Appliance Filter Bypass Vulnerability

State: Published
Severity: 5.8 Medium
Published: Apr 6, 2022
Updated: Nov 6, 2024
Reserved: Nov 2, 2021

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.8 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N	cisco

Weaknesses

CWE-20

Affected Products

Product	Versions
Cisco Web Security Appliance (WSA)Cisco	n/aAffected

References

20220406 Cisco Web Security Appliance Filter Bypass Vulnerabilityvendor-advisory

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