CVE-2022-20713
MediumCVSS 4.3Exploitation Probability (EPSS)
Elevated risk74th percentile - higher than 74% of all known CVEs
Summary
A vulnerability in the VPN web client services component of Cisco ASA and FTD Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users. The issue is due to improper validation of input passed to the component before being returned to the browser. An attacker could exploit this by persuading a user to visit a website that sends malicious requests to an affected device with VPN web services enabled.
Risk Assessment
The risk includes the possibility of cross-site scripting (XSS) attacks on users, potentially leading to data theft or session hijacking, but without direct impact on the device.
Recommendation
It is recommended to upgrade ASA/FTD software to a patched version and educate users on safe browsing practices.
Original NVD description (English source)
A vulnerability in the VPN web client services component of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device. This vulnerability is due to improper validation of input that is passed to the VPN web client services component before being returned to the browser that is in use. An attacker could exploit this vulnerability by persuading a user to visit a website that is designed to pass malicious requests to a device that is running Cisco ASA Software or Cisco FTD Software and has web services endpoints supporting VPN features enabled. A successful exploit could allow the attacker to reflect malicious input from the affected device to the browser that is in use and conduct browser-based attacks, including cross-site scripting attacks. The attacker could not directly impact the affected device.