Introduction to Reflected XSS into a JavaScript string with single quote and backslash escaped
In XSS into a JavaScript string, Reflected Cross-Site Scripting (XSS) is a web security vulnerability where untrusted user input is not properly sanitized or encoded. An attacker can exploit this vulnerability by injecting malicious scripts with escaped single quotes and backslashes. To mitigate this vulnerability, web developers should implement robust input validation and output encoding techniques. Input validation ensures user-supplied data is thoroughly checked and sanitized, while output encoding encrypts user-generated content before displaying it in the JavaScript string. Prioritizing web security, secure coding practices, and regular security audits help minimize the risk of XSS vulnerabilities in JavaScript strings, protecting web applications, user data, and maintaining a secure online environment.
Lab Solutions | Practical Work Time XSS into a JavaScript string
This lab contains a reflected cross-site scripting vulnerability in the search query tracking functionality. The reflection occurs inside a JavaScript string with single quotes and backslashes escaped.
To solve this lab, perform a cross-site scripting attack that breaks out of the JavaScript string and calls the alert function.
Stepwise Solution of the lab:-
After accessing this lab, we first noticed it has “Search” functionality.
Now we will check the functionality via any random word.
In this scenario, we can use a payload such as below this one.
</script><script>alert(1)</script>
Now click on Search button and see what will happen.
BOOM! Got the prompt and we successfully solved the lab.
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FAQS
Website security refers to protecting a website or web application from cyberattacks, unauthorized access, or other security threats.
Web application security means protecting a website from cyberattacks. These attacks may include vulnerabilities such as SQL injection, XSS, file inclusion, and others.
It is always a good practice to use an up-to-date browser with timely updates. Keep your browser plugins up-to-date, avoid malicious websites and links, and always enable 2-factor authentication while avoiding clickjacking.
Searching for someone’s social security number or credit card information on the dark web is illegal and unethical. It is important to always avoid such activities and protect yourself and others from cyber threats.
