CVE-2021-23038: F5 BIG-IP Access Policy Manager

Critical severity, CVSS 9.0. EPSS: 0.9% chance of exploitation in the next 30 days.

On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.2, 13.1.x before 13.1.4.1, and all versions of 12.1.x, a stored 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.

Affected products

  • F5 BIG-IP Access Policy Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Advanced Firewall Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Analytics: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Application Acceleration Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Application Security Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Domain Name System: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Fraud Protection Service: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Global Traffic Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Link Controller: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Local Traffic Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4.1 (fixed in 13.1.4.1); from 14.1.0, before 14.1.4.2 (fixed in 14.1.4.2); from 15.1.0, before 15.1.3.1 (fixed in 15.1.3.1); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Policy Enforcement Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.1.0 (fixed in 16.1.0)

Published 2021-09-14. Last modified 2026-06-17.