Original Post: Secure applications – User Input. When it comes to application security… | by overhead | Jun, 2024
The content discusses application security, emphasizing its challenges and the importance of focusing on reducing risk by identifying areas where an attack could have the greatest impact. It highlights the Common Vulnerability Scoring System (CVSS) used to measure the impact of vulnerabilities, but notes that it might not be feasible for small security teams with many vulnerabilities.
The article lists common vulnerabilities, particularly those related to user input, such as unsanitized user-provided data in web applications. Code examples in JavaScript (Express.js) and PHP illustrate these vulnerabilities and the risks of incorporating user input without appropriate security measures.
To mitigate such risks, the content recommends practices like:
– Sanitizing user input
– Escaping output
– Using Content Security Policy (CSP) headers
– Utilizing prepared statements
It warns against over-reliance on Web Application Firewalls (WAFs), as they might be bypassed, suggesting that a combination of mitigation steps is essential for securing applications and businesses. The document concludes by advising consultation of further documentation for more detailed information.
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