POA-87245 OpenAPI method "pem.bindUserToSubscription"
Also includes fix from “POA 5.5.7 HOTFIX 122626 login history”:
POA-87330 Security vulnerability
Hotfix can be downloaded here.
Use pa_updates_installer (https://kb.odin.com/en/111323) to install this hotfix. Also this hotfix will be installed automatically during upgrade to POA 5.5.7 via pa_updates_installer. To install hotfix manually obtain its distributive from the link above and follow instructions found in file UPDATE.txt of distributive.