With hundreds of possible payload variants, and being one of the most common vulnerabilities in web applications, XSS can sometimes be difficult to find or, if found, difficult to generate a convincing proof of concept exploit that motivates the client's team to dedicate the time and effort to fix it. Additionally, big applications with hundreds or thousands of input parameters are nearly impossible to cover completely in time-boxed tests.

For these reasons, you may need to make use of automation to be able to generate results faster, even when some degree of precision may be sacrificed and with an increased risk of triggering some service disruption in the application. There are many web vulnerability scanners, both free and paid, with a wide range of degrees of accuracy, stability, and safety. We will now review a couple of specialized scanners for XSS vulnerabilities that have proven to be efficient and reliable.