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

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].

The ) and } characters attempt to close existing function calls or brackets in the original SQL statement. {KEYWORD}) UNION ALL SELECT NULL,NULL#

Identify the database version and schema to plan a larger breach [1]. 4. Recommended Fixes

Force a "True" result to log in without a password. The ) and } characters attempt to close

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:

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 Recommended Fixes Force a "True" result to log

Access sensitive information like user credentials, emails, or financial records.