FOSSBilling version 0.5.3 has just been released which resolves 3 significant security vulnerabilities:
0.5.3 (6-30-23)
Security
Bug fixes
- We've fixed usage of dark-mode in the admin panel.
New Features
FOSSBilling now includes a "API Key" product which can be used to sell API keys for use in your applications. Docs: https://fossbilling.org/docs/product-types/apikeys
As a friendly heads up, if you are still using a version older than 0.5.x, you will need to first update to 0.5.0 and then update to the lastest version.