An attacker injects a tag into a profile or a comment. When another user views that page, the script runs in their browser. This can be used to: Steal session cookies. Redirect users to malicious sites. Modify the page content (Defacement). The Defense Only allow expected characters.
Gruyere (named after the holey cheese) is an open-source, tiny, yet viciously realistic web application. Unlike capture-the-flag (CTF) platforms that use abstract challenges, Gruyere mimics a real social media snippet application—complete with profiles, snippets, and administrative features. gruyere learn web application exploits defenses top
is a intentionally vulnerable web application created by Google to serve as a "cheesy" (pun intended) testing ground for developers and security enthusiasts to learn the fundamentals of web security. By exploring Gruyère, you can gain hands-on experience with common vulnerabilities—referred to as "exploits"—and, more importantly, how to build robust "defenses" against them. An attacker injects a tag into a profile or a comment
Don't rely on a single security measure; layer them. Redirect users to malicious sites