Security Documentation
Comprehensive security reference and best practices
Security Overview
Application Security
This vulnerable web application demonstrates common security flaws found in modern web applications. Each vulnerability represents real-world attack vectors that security professionals should understand.
- ●Critical: SQL Injection, File Upload
- ●High: XSS, IDOR, LFI
- ●Medium: Information Disclosure
Learning Objectives
- ✓Identify common web application vulnerabilities
- ✓Understand attack vectors and exploitation techniques
- ✓Learn effective mitigation strategies
- ✓Apply security best practices in development
Vulnerability Categories
Injection Vulnerabilities
Code injection attacks that exploit poor input validation
SQL Injection
CriticalMalicious SQL code injection into application queries
Data breach, authentication bypass, data manipulation
Parameterized queries, input validation, least privilege
Cross-Site Scripting (XSS)
HighClient-side script injection in web applications
Session hijacking, data theft, site defacement
Input sanitization, output encoding, CSP headers
Access Control Flaws
Improper restrictions on authenticated users
Insecure Direct Object Reference (IDOR)
HighDirect access to objects without proper authorization
Unauthorized data access, privacy violations
Access control checks, indirect references, session validation
File System Vulnerabilities
Improper handling of file operations and uploads
Local File Inclusion (LFI)
HighUnauthorized access to local server files
Source code disclosure, configuration exposure
Path validation, file whitelisting, access restrictions
Unrestricted File Upload
CriticalUpload of malicious files without proper validation
Remote code execution, system compromise
File type validation, sandboxing, malware scanning
Security Principles
Defense in Depth
Multiple layers of security controls to protect against failures
- •Network firewalls
- •Application firewalls
- •Input validation
- •Access controls
Least Privilege
Users and processes should have minimum necessary permissions
- •Role-based access
- •Database permissions
- •File system access
- •API limitations
Fail Securely
System should fail to a secure state when errors occur
- •Error handling
- •Default deny policies
- •Session timeouts
- •Graceful degradation
Input Validation
All input should be validated, sanitized, and verified
- •Whitelist validation
- •Data type checking
- •Length limits
- •Character encoding
External Security Resources
Standards & Guidelines
Learning Platforms
Recommended Security Tools
Web Application Scanners
- • Burp Suite Professional
- • OWASP ZAP
- • Nikto
- • SQLMap
Static Analysis
- • SonarQube
- • ESLint Security Plugin
- • Bandit (Python)
- • Semgrep
Network Tools
- • Nmap
- • Wireshark
- • Metasploit
- • Nessus