passenger is a modern web server and application server for Ruby, Python and Node.js, optimized for performance, low memory usage and ease of use.
Affected versions of this package are vulnerable to Arbitrary File Write. During the spawning of a malicious Passenger-managed application, SpawningKit allows such applications to replace key files or directories in the spawning communication directory with symlinks. This then could result in arbitrary reads and writes, which in turn can result in information disclosure and privilege escalation.
passenger to version 5.3.2 or higher.