![]() ![]() Attackers can exploit this weakness and use input boxes on the form to send their own requests to the database. Potential problems arise because most web forms have no way of stopping additional information from being entered on the forms. When that information is added, it's checked against a database, and if it matches, the user is granted entry. Typically, this type of web form is designed to accept only specific types of data such as a name and/or password. An example is when login information is submitted via a web form to allow a user access to a site. Since the vast majority of websites and web applications rely on SQL databases, an SQL injection attack can have serious consequences for organizations.Īn SQL query is a request sent to a database for some type of activity or function such as query of data or execution of SQL code to be performed. SQL is a query language used in programming to access, modify, and delete data stored in relational databases. To understand SQL injection, it’s important to know what structured query language (SQL) is. It's one of the most prevalent and threatening types of attack because it can potentially be used against any web application or website that uses an SQL-based database (which is most of them). SQL injection – meaning and definitionĪn SQL injection, sometimes abbreviated to SQLi, is a type of vulnerability in which an attacker uses a piece of SQL (structured query language) code to manipulate a database and gain access to potentially valuable information. This explainer outlines what they are, how they work, and how you can prevent them. SQL injection attacks are one of the oldest web application vulnerabilities –having been discussed since the late 1990s – but they still remain relevant today.
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