When a URL contains index.php?id= , the id parameter often passes user input directly into a database query. If the web developer did not sanitize this input or use prepared statements, the application becomes vulnerable to SQL Injection. Attackers can append SQL commands to the URL to bypass authentication, read sensitive database contents, or modify records. 2. Cross-Site Scripting (XSS)
SQL Injection occurs when malicious SQL statements are inserted into entry fields for execution. If an application fails to sanitize the id parameter, an attacker can append SQL commands to the URL (e.g., index.php?id=45 UNION SELECT username, password FROM users ). The database executes this modified query, potentially exposing sensitive user data, administrative credentials, or proprietary information. 2. Cross-Site Scripting (XSS)
| Goal | Operator | Example Modification | | :--- | :--- | :--- | | | intitle: | inurl:-.com.my index.php id intitle:admin | | Error Exploitation | intext: | inurl:-.com.my index.php id intext:"mysql_fetch_array" | | File Type Search | filetype: | inurl:-.com.my index.php id filetype:php | inurl -.com.my index.php id
To help you assess or secure your application, let me know if you would like to explore in PHP, how to configure a WAF to block automated query scans, or how to write URL rewrite rules to hide your parameters. Share public link
: The default landing or directory page for many PHP-based websites. When a URL contains index
It often indicates a webpage that pulls content based on a numerical ID.
: Focus specifically on any code that accepts user input and uses it to query a database. Ensure no SQL queries are built using string concatenation. Pay particular attention to dynamic column names in ORDER BY or GROUP BY clauses—they require whitelist validation because prepared statements cannot secure them. Use code with caution.
If the website's developers did not properly secure how this id input is handled, the site becomes highly susceptible to two major classes of web vulnerabilities. 1. SQL Injection (SQLi)
Ensure that your server-side code verifies the data type of incoming parameters before processing them. If an id parameter is strictly supposed to be an integer, enforce this rule within your PHP code using typecasting: $id = (int)$_GET['id']; Use code with caution.