Tuesday, March 25, 2008

Check Whether Your Website IS XSS Vulnerable?

Free Cross Site Scripting Security Scanner

Acunetix, last year in November, launched a Free edition of its popular web vulnerability scanner, which allows companies to check for cross site scripting vulnerabilities in their websites at no charge. The Free Edition of Acunetix Web Vulnerability Scanner (WVS) is available here.

What is Cross Site Scripting?

Cross Site Scripting allows an attacker to embed malicious JavaScript, VBScript, ActiveX, HTML, or Flash into a vulnerable dynamic page to fool the user, executing the script on his machine in order to gather data. The use of XSS might compromise private information, manipulate or steal cookies, create requests that can be mistaken for those of a valid user, or execute malicious code on the end-user systems. The data is usually formatted as a hyperlink containing malicious content and which is distributed over any possible means on the internet. Cross site scripting vulnerabilities are extremely dangerous and the number of the attacks is on the rise. More information about Cross Site Scripting can be found at here.

In a study conducted by Acunetix, 42% of the websites scanned with Acunetix WVS were found to be vulnerable to Cross Site Scripting.

“Companies don’t realize the danger their web sites are under and are therefore reluctant to invest in web vulnerability scanners. Consequently, security officers don’t have the tools to protect their websites. The free XSS scanner will give security officers access to a professional cross site scanning tool, that will allow them to assess their web sites for the cross site scripting danger,” said Jonathan Spiteri, Technical Manager of Acunetix.

Scanning for XSS vulnerabilities with Acunetix WVS Free Edition


To check whether your website has cross site scripting vulnerabilities, download the free edition from here. This version will scan any website / web application for XSS vulnerabilities and it will also reveal all the essential information related to it, such as the vulnerability location and remediation techniques. Scanning for XSS is normally a quick exercise (depending on the size of the web-site). A detailed guide how to scan for cross site scripting vulnerabilities can be found here.

The Free Edition also allows you to sample what other threats Acunetix WVS can find by allowing you to scan the Acunetix test sites for vulnerabilities.

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