Steal cookies, session tokens, or deface the website. 2. Cross-Site Request Forgery (CSRF)
XSRF tricks a victim's browser into performing an unwanted action on a different website where they are currently authenticated.
This occurs when user input is incorrectly filtered for string literal escape characters and is then passed to a SQL interpreter.
Store authorization states and user roles exclusively on the server.
Gruyère demonstrates how dangerous it is to trust data stored on the user's computer, such as cookies or URL parameters. The Exploit gruyere learn web application exploits defenses top
If you must store data on the client, sign it with a secret key so the server can detect if it has been tampered with. 🗺️ Path Traversal
Attempt to run your previous exploit payload against the updated application to ensure your defense mechanism successfully blocks the attack without breaking the application's core functionality. Top Strategic Defenses for Modern Web Applications
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Knowing the exploits is half the battle. The other half is building a strong defense and testing it. Steal cookies, session tokens, or deface the website
While patching specific bugs inside Gruyere is valuable, building resilient real-world software requires defense-in-depth strategies. Ensure these core security controls are applied across your entire development lifecycle:
Attackers can inject malicious scripts into snippets or file uploads. When another user views that page, the script executes in their browser, potentially stealing session cookies or redirecting them to a phishing site.
Convert dangerous characters into their safe HTML entity equivalents (e.g., convert < to < and > to > ) before rendering them in the browser.
For each of the 10 exploits above:
CSRF forces an end user to execute unwanted actions on a web application in which they are currently authenticated. The Exploit
Glossary of terms (XSS, CSRF, SSRF, IDOR, XXE, RCE, WAF, SAST, DAST).
Use code with caution.
Understanding Google Gruyere: A Hands-On Guide to Web Application Vulnerabilities and Defenses This occurs when user input is incorrectly filtered