This tweet talks about a complete collection of web shells that are specially designed to bypass Web Application Firewall (WAF) restrictions during file upload processes. Web Application Firewalls are security tools used to monitor and filter incoming traffic to web applications, helping to block malicious attacks like those involving web shells. Web shells are malicious scripts uploaded to a web server that allow attackers to remotely execute commands and control the server. The collection mentioned in the tweet likely includes various web shells that have been crafted to avoid detection or blocking by different WAFs during the file upload stage, a common method attackers use to compromise web servers. Such a collection could be used by security researchers for testing or by attackers to exploit vulnerable systems that rely solely on WAFs for protection during file uploads.
Check out the original tweet here: https://twitter.com/NoRugCoin/status/1952496938513015124