The keyword you provided contains a payload. This specific string is designed to trick a database into revealing information it shouldn't, typically by appending a second query to the original one using the UNION ALL operator. Technical Breakdown

: This is a string concatenation used as a "fingerprint." If the attack is successful, the page will display this unique string, confirming the database is vulnerable.

To prevent this, you should never insert user input directly into SQL strings. Instead, use . This treats the input as literal text rather than executable code, rendering the injection attempt harmless.

: Steal usernames, passwords, or sensitive records.

: The double dash is a comment in SQL, which tells the database to ignore everything after it, effectively neutralizing the rest of the original, legitimate code. Security Implications

: These act as placeholders. For a UNION attack to work, the second query must have the exact same number of columns as the first.

If this input was successfully processed by a system, it would indicate a high-risk vulnerability. An attacker could potentially:

: Log in as an administrator without a password.