xHarbour is a portable implementation of the xBase language (Compiler & complete Run-time libraries). It's practically 100% backward compatible with CA-Clipper 5.2e and 5.3c, and offers many modern language extensions, and extensive Run-time libraries.
There are no reported vulnerabilities
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.