CVE-2016-1431

Vulnerability

A cross-site scripting (XSS) vulnerability exists in the HTTP framework of Cisco Firepower Management Center (FMC) due to insufficient filtering of output data [1]. This allows remote attackers to inject arbitrary web script or HTML via a crafted URL. Affected versions include 4.10.3, 5.2.0, 5.3.0, 5.3.1, and 5.4.0 [1].

Exploitation

An unauthenticated, remote attacker can exploit this vulnerability by persuading a user to follow a link to a malicious site or by intercepting a user request and injecting malicious code into the request [1]. No authentication or special privileges are required.

Impact

Successful exploitation allows the attacker to execute arbitrary script in the context of the affected site or access sensitive browser-based information [1]. This can lead to disclosure of session tokens, credentials, or other data accessible in the browser.

Mitigation

As of the advisory publication date (June 17, 2016), Cisco has not released software updates that address this vulnerability, and there are no workarounds [1]. Users are advised to monitor Cisco's security advisories for future updates and consider upgrading to a fixed version when available [1].