Glossary of Security Terms: Cross-Site Scripting

Cross-site scripting (XSS) is a security exploit which allows an attacker to inject into a website malicious client-side code. This code is executed by the victims and lets the attackers bypass access controls and impersonate users. According to the Open Web Application Security Project, XSS was the in 2017.These attacks succeed if the Web app does not employ enough validation or encoding. The user's browser cannot detect the malicious script is untrustworthy, and so gives it access to any cookies, session tokens, or other sensitive site-specific information, or lets the malicious script rewrite the content.

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• Block cipher mode of operation
• Certificate authority
• Challenge-response authentication
• Cipher
• Cipher suite
• Ciphertext
• CORS
• CORS-safelisted request header
• CORS-safelisted response header
• Cryptanalysis
• Cryptographic hash function
• Cryptography
• CSP
• CSRF
• Decryption
• Digital certificate
• DTLS (Datagram Transport Layer Security)
• Encryption
• Forbidden header name
• Forbidden response header name
• Hash
• HMAC
• HPKP
• HSTS
• HTTPS
• Key
• MitM
• OWASP
• Preflight request
• Public-key cryptography
• Reporting directive
• Robots.txt
• Same-origin policy
• Session Hijacking
• SQL Injection
• Symmetric-key cryptography
• TOFU
• Transport Layer Security (TLS)

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