Top 4 Web Vulnerabilities With Example and Mitigation

Web security best practices are often overlooked by developers. This leaves vulnerabilities in the application that hackers can exploit to gain information from the server or other clients. Furthermore, more dangerous attacks can enable hackers to take over the server and disrupt its operations.

1) SQL Injection (SQLi)

SQL Injection is the most basic security vulnerability that allows an attacker to interfere with the SQL queries to insert a malicious query to the application database. With attackers are able to manipulate the execution of SQL statements, potentially gaining unauthorized access to data, modifying or deleting data, or even executing administrative operations on the database.

Types of SQL Injection

1. In-Band SQLi: The most frequent and commonly used attack where attacker uses the same channel to launch the attack and gather database information. This includes:

• Union-based SQLi: Using the UNION operator to combine the results of two or more SELECT statements.
• Error-based SQLi: Leveraging error messages to gather information about the database schema.

2. Blind or Inferential SQLi: The attacker does not see the result of the query but can infer information based…