This specific payload is often generated by automated security scanners (like ). Seeing this in your logs means someone—or some bot—is knocking on your door to see if the deadbolt is actually locked. It’s a reminder that in the world of web security, "sanitizing" user input isn't just a best practice; it's the difference between a secure site and a public data leak.
: The attacker is playing a guessing game. A UNION attack only works if both queries have the exact same number of columns . By repeating "34," the attacker is testing if the database table has 10 columns. If the page loads without an error, they’ve found the "shape" of the table. -9825 UNION ALL SELECT 34,34,34,34,34,34,34,34,34,34#
: This is the heart of the exploit. The UNION operator tells the database, "Take the results of the first search and glue them to the results of this second search." This specific payload is often generated by automated
: The attacker starts with a value that likely doesn't exist (like a negative ID number). This "breaks" the original intended query, forcing the database to ignore the real results and display the attacker's fake results instead. : The attacker is playing a guessing game
This "subject" is a classic example of a payload, specifically a Union-Based Injection attack. To the untrained eye, it looks like gibberish; to a database, it’s a command to leak data. The Anatomy of the Attack