Cisco NAC Appliance contains a vulnerability in the web authentication function that could allow an unauthenticated, remote attacker to conduct a cross-site scripting attack.
The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted request. Successful exploitation may aid the attacker in retrieving session cookies, stealing recently submitted data, or launching further attacks.
Cisco NAC Appliance contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.
The vulnerability is due to insufficient validation of user-supplied input processed by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to follow a malicious URL. Successful exploitation could allow an attacker to execute arbitrary script code in a user's browser session in the security context of the site that is hosted by the affected software.
Cisco has confirmed this vulnerability in a security notice and software updates are available.
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.