On BIG-IP version 16.0.x before 16.0.1.2 15.1.x before 15.1.3 14.1.x before 14.1.4.2 13.1.x before 13.1.4.1 and all versions of 12.1.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 current logged-in user. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.