All-in-one free web application security tool. Web application vulnerability and privacy scanner with support for HTTP cookies, Flash, HTML5 localStorage, sessionStorage, CANVAS, Supercookies, Evercookies. Includes a free SSL/TLS, HTML and HTTP vulnerability scanner and URL malware scanner.
X-XSS-Protection
HTTP headerControls an Cross-Site Scripting (XSS) filters built into the majority of web browsers. The filter is usually turned on by default anyway, but requirement to set the header to 1
became part of canonical set of "secure" HTTP headers. Over time, vulnerabilities in the "sanitizing" mode filter were found, so 1; mode=block
became the recommended value. Some companies decided that they don't really need a browser-side XSS filter to mess with their web services which are XSS-free anyway and they became consciously disabling the XSS filter by setting the header to 0
.
We have seen 10381 websites setting the
X-XSS-Protection
HTTP header and 375 unique values of this header.
1; mode=block
1; mode=block
1; mode=block
0
1; mode=block
0
0
0
1; mode=block
1; mode=block
1; mode=block
1; mode=block
1; mode=block
1
1; mode=block
1; mode=block
1; mode=block
0
0
1; mode=block
1; mode=block
0
1; mode=block
1; mode=block
1