CVE-2020-5853: F5 BIG-IP Access Policy Manager

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

In BIG-IP APM portal access on versions 15.0.0-15.1.0, 14.0.0-14.1.2.3, 13.1.0-13.1.3.2, 12.1.0-12.1.5, and 11.5.2-11.6.5.1, when backend servers serve HTTP pages with special JavaScript code, this can lead to internal portal access name conflict.

Affected products

• F5 BIG-IP Access Policy Manager: from 11.5.2, up to and including 11.6.5; from 12.1.0, up to and including 12.1.5; from 13.1.0, up to and including 13.1.3; from 14.0.0, up to and including 14.1.2; from 15.0.0, up to and including 15.1.0

Published 2020-01-14. Last modified 2026-06-17.