Vulnerability Bulletins

Cisco Email Security Appliance URL Filtering Bypass Vulnerability

System information

Affected software Cisco


A vulnerability in the URL filtering mechanism of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the URL reputation filters on an affected device. This vulnerability is due to improper processing of URLs. An attacker could exploit this vulnerability by crafting a URL in a particular way. A successful exploit could allow the attacker to bypass the URL reputation filters that are configured for an affected device, which

More info:

Standar resources

Property Value
CVE CVE-2023-20057.

Version history

Version Comments Date
1.0 Advisory issued 2023-01-19
Ministerio de Defensa