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This type of attacks aims on websites that display the data entered by users. Instead of trying to access the database by entering harmful code, attackers are aimed at the code of the website itself, introducing harmful fragments into its structure.
Many websites store users' names in the database to display them at each entrance to the site. The attacker can create a fake account by entering the malicious code in the name. Such a code can be implemented using JavaScript, which then loads malicious content from another website. The database will not store the user name, but the code that, when displayed on the site, can be executed, which poses a serious threat to the safety of your site in Yandex.
Developers often ignore this aspect of security. Recent incidents showed that many popular sites became victims of the XSS attacks, among which there were large resources such as Myspace, Facebook, Google and others.
Consider the following example of the PHP code, which can be vulnerable to XSS:
$firstname = $_POST["firstname"]; echo "Your name: $firstname";
After entering the name on the web form, the site displays the corresponding message. If you enter the name "Chris", the message will be as follows: "Your name: chris."
However, if you enter the following code instead of the name: “”, this will lead to the implementation of the malicious code.
The fight against XSS attacks requires careful filtration of all entered and displayed data, including data from Get and Post requests, as well as from the database. It is necessary to properly process all the fields that users can change to prevent the introduction of malicious scripts.
In PHP, various packages, such as Codeigniter, can be used to protect against XSS attacks. In addition, PHP has a built -in function specialcharswhich helps to filter the output data, preventing the execution of malicious scripts on your site in Yandex.
To protect against XSS attacks, it is important to use data filtering methods at all levels of interaction with the user. This is especially important for sites displaying personal data or other sensitive information.
If you want to understand in more detail the mechanisms of protecting your site from the XSS attacks or you have questions about the safety of the site in Yandex, you can contact the SEO.computer SEO company. Experts will help you find the best data protection solutions. Contact through email info@seo.computer or WhatsApp by number +79202044461.
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