Secure File Upload Best Practices: Blocking Malicious File Uploads

Secure File Upload Best Practices: Blocking Malicious File Uploads

Does your website allow users to upload files? Learn secure file upload best practices and prevent dangerous vulnerabilities and attacks.

Almost every web application accepts user input, and one of the most common types of input is in the form of file uploads. Whether it’s a consumer application where users are uploading photos, or a business application that accepts pdfs and word documents, file uploads are an essential feature. However, they also open up the site to a host of potential risks and vulnerabilities.

Exploited by a hacker, a file upload vulnerability can open up a site to malware, unauthorized server access, attacks to website visitors, the hosting of illegal files,

The path and file name can trick an application into copying the file to an unexpected location that could overwrite an important file and cause unexpected behavior. For example, an attacker could use control characters in the c# sanitize filename to trick the system into overwriting an important configuration file. As a developer, it’s important to identify cost-effective ways to handle file upload security and evaluate the tradeoffs between an in-house and third-party solution. Visit blog.filestack once today!