svnWebUI v1.8.3 was discovered to contain an arbitrary file deletion vulnerability via the dirTemps parameter under com.cym.controller.UserController#importOver. This vulnerability allows attackers to delete arbitrary files via a crafted POST request.
The product contains protection mechanisms to restrict access to ‘realdir/filename’, but it constructs pathnames using external input in the form of ‘fakedir/../realdir/filename’ that are not handled by those mechanisms. This allows attackers to perform unauthorized actions against the targeted file.