Cross-Site Scripting (XSS) is a security vulnerability where attackers inject malicious scripts into web pages viewed by other users, potentially stealing sensitive information or hijacking user sessions.
Attack Types
- Reflected XSS
- Stored XSS
- DOM-based XSS
- Blind XSS
- Mutation XSS
Impact Areas
- Data theft
- Session hijacking
- Cookie stealing
- Credential theft
- Content manipulation
Attack Vectors
- Form inputs
- URL parameters
- Stored content
- Dynamic rendering
- Client-side code
Prevention Methods
- Input validation
- Output encoding
- Content filtering
- Security headers
- CSP implementation
Best Practices
- Data sanitization
- Security testing
- Regular updates
- Code review
- User education
XSS attacks remain a significant threat to web application security.