CVE-2017-6539 (webpagetest)
Multiple Cross-Site Scripting (XSS) issues were discovered in webpagetest 3.0. The vulnerabilities exist due to insufficient filtration of user-supplied data (benchmark, time) passed to the webpagetest-master/www/benchmarks/delta.php URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.
Source: CVE-2017-6539 (webpagetest)