Docassemble is an expert system for guided interviews and document assembly. The vulnerability allows attackers to gain unauthorized access to information on the system through URL manipulation. It affects versions 1.4.53 to 1.4.96. The vulnerability has been patched in version 1.4.97 of the master branch.
The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.