There is a possible DoS vulnerability in the multipart parser in Rack before 2.0.6. Specially crafted requests can cause the multipart parser to enter a pathological state, causing the parser to use CPU resources disproportionate to the request size.

WalRack 1.x before 1.1.9 and 2.x before 2.0.7 does not properly restrict file uploads, which allows remote attackers to execute arbitrary PHP code via vectors involving a double extension, as demonstrated by a .php.zzz file.

Unspecified vulnerability in WalRack 1.x before 1.1.8 and 2.x before 2.0.6 has unknown impact and attack vectors, possibly related to file deletion and an encoded URL, a different vulnerability than CVE-2011-1329.