The Jena GRDDL Reader is an incomplete implementation of an unfinished specification. An important area in which the implementation is incomplete concerns the security section .
A few key limitations of this software, detailed both on the Web and in the documentation (file: doc/security-conformance.html) which ships with the software, are:
Note that GRDDL permits transforms to construct URLs that are then retrieved. In this way, any data accessed inappropriately can be transmitted to an untrusted server.
Of course, any bugs in the implementation of the security features that have been implemented, may result in more serious problems: these could include writing to arbitrary files on your system, permitting malicious code to take control of your system.