Answer:
True.
Step-by-step explanation:
File upload vulnerabilities are indeed a big risk for many web applications if proper security controls are not implemented on file uploads. This is because file uploads can be used to upload malicious files, such as viruses or malware, onto a web server, potentially compromising the security and integrity of the server and its data. Additionally, attackers can use file uploads to execute arbitrary code on the server, giving them full control over the server and its resources.
To mitigate these risks, it is important to implement proper security controls on file uploads, such as checking the file type and size, validating the file name and content, and storing uploaded files in a secure location on the server. Additionally, web developers should follow secure coding practices, such as sanitizing input data and escaping output data, to prevent common security vulnerabilities.