inian··on Widespread XSS Vulnerabilities in Ad Network Codeyup pretty much. We managed to report and fix some bugs though. But it is pretty hard to get the point of contact person for some websites.
inian··on Widespread XSS Vulnerabilities in Ad Network CodeWe conducted a similar experiment on the top 1000 websites and found 820 unique DOM-Based XSS vulnerabilities in these sites! You can find out more about our techniques in our paper here http://www.comp.nus.edu.sg/~enricob/2015/fse15-main.pdf