{keyword}) Union All Select Null,null# -

Ensure the database user account has the minimum permissions necessary, preventing access to system-level tables [4].

The input {KEYWORD}) UNION ALL SELECT NULL,NULL# is a classic payload. This specific string is designed to break out of a developer-defined query and append a UNION statement, allowing an attacker to retrieve data from other tables or probe the database structure [1]. 2. Technical Analysis

Identify the database version and schema to plan a larger breach [1]. 4. Recommended Fixes {KEYWORD}) UNION ALL SELECT NULL,NULL#

Force a "True" result to log in without a password.

Access sensitive information like user credentials, emails, or financial records. Ensure the database user account has the minimum

Security Audit Report: SQL Injection Vulnerability Critical / High Priority Location: Query Parameter {KEYWORD} 1. Vulnerability Summary

UNION ALL SELECT NULL,NULL is used to determine the number of columns in the original query's SELECT statement. If the page loads without an error, the attacker knows the original table has exactly two columns [2]. Recommended Fixes Force a "True" result to log

The # character (used in MySQL/MariaDB) comments out the rest of the legitimate query, preventing syntax errors from trailing code [3]. 3. Potential Risk An attacker successfully using this technique can: