Cisco Access Control System Stored Cross-Site Scripting Vulnerability

A vulnerability in the web-based management interface of the Cisco Secure Access Control System (ACS) could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web interface of the affected system.

The vulnerability is due to insufficient input validation of user-supplied values and a lack of encoding of user-supplied data. An attacker could exploit this vulnerability by convincing a user to click a malicious link.

Additional information about XSS attacks and potential mitigations can be found at the following links:

https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20060922-understanding-xss [“https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20060922-understanding-xss”]
https://www.owasp.org/index.php/Cross-site_Scripting_(XSS) [“https://www.owasp.org/index.php/Cross-site_Scripting_(XSS)”]

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170726-acs [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170726-acs”]