Attack Chain

1. Attacker performs reconnaissance to identify endpoints on the web application that handle user-supplied input (e.g., login forms, search bars, or parameter-based filters).
2. Attacker sends specially crafted HTTP requests containing SQL metacharacters (e.g., single quotes, comments, or logical operators) to the target parameters.
3. The CMS fails to sanitize the input, passing the attacker-controlled characters directly into the backend SQL query execution flow.
4. The application executes the injected code, allowing the attacker to bypass authentication mechanisms or extract data from unintended database tables.
5. Attacker progressively probes the database schema (e.g., using UNION-based injection) to map tables and columns.
6. Attacker leverages the access to exfiltrate sensitive information or perform unauthorized administrative actions against the underlying database.

Impact

Successful exploitation of this vulnerability allows unauthenticated remote attackers to gain full control over the application's backend database. This can result in complete data exfiltration of user records, unauthorized modification or deletion of critical business data, and potential server-side impact if the database service is misconfigured with elevated privileges.

Recommendation

• Deploy WAF rules designed to inspect HTTP request parameters for common SQL injection patterns (e.g., ' or 1=1, --, UNION SELECT).
• Enable web server access logging to monitor for anomalous characters in URI queries or POST parameters.
• Audit application logs for patterns indicating unauthorized database enumeration or unauthorized access.
• Implement strict input validation and parameterized queries at the application level if internal development capacity allows for custom hotfixes.