{keyword}) Union All Select Null,null# Apr 2026

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

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]. {KEYWORD}) UNION ALL SELECT NULL,NULL#

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

Access sensitive information like user credentials, emails, or financial records. Technical Analysis UNION ALL SELECT NULL,NULL is used

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

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:

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