posttester

A jar file that will send POST requests to servers in order to test for the hash collision vulnerability discussed at th

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Platforms: Linux · Last verified September 6, 2026

A jar file that will send POST requests to servers in order to test for the hash collision vulnerability discussed at the Chaos Communication Congress in Berlin.

Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.

Getting started

Install on BlackArch with `pacman -S posttester` (or add the BlackArch repository to an existing Arch Linux install). See the official BlackArch tool listing and upstream homepage linked above for details.

Commonly preinstalled on

BlackArch

Arch Linux-based distribution with one of the largest pentest tool repositories