Multiple cross-site scripting (XSS) vulnerabilities in Benjamin Pasero and Tobias Eichert RSSOwl allow remote attackers to inject arbitrary web script or HTML via a web feed, as demonstrated by certain test cases of the Robert Auger and Caleb Sima RSS and Atom feed reader test suite.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29049
https://euvd.enisa.europa.eu/vulnerability/EUVD-2006-4747
http://www.vupen.com/english/advisories/2006/3685
http://www.securityfocus.com/bid/20110
http://www.cgisecurity.com/papers/RSS-Security.ppt