Online Discussion Forum

101

An Online Discussion Forum is a web-based platform where users can post messages, ask questions, and engage in threaded conversations—typically organized by topic. It allows for asynchronous communication and knowledge sharing among communities. While less popular today due to the rise of real-time tools like Discord or Slack, forums are still widely used in niche communities, open-source projects, and support sites.

Attacks

The Online Discussion Forum Site 1.0 application suffers from an unauthenticated RCE vulnerability due to improper file upload handling. During user registration (/register.php), attackers can upload a malicious .php shell, which is then placed in a web-accessible directory (/ups/).

$ curl http://172.16.1.1/discuss/ups/webshell.php?c=whoami