On BIG-IP DNS & GTM version 16.x before 16.1.0 15.1.x before 15.1.4 14.1.x before 14.1.4.4 and all versions of 13.1.x 12.1.x and 11.6.x a DOM-based cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows an attacker to execute JavaScript in the context of the currently logged-in user. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.