Cross-site scripting (XSS) vulnerability in Google Toolbar 2.0.114.1 allows remote attackers to inject arbitrary web script via about.html in the About section. NOTE: some followup posts suggest that the demonstration code's use of the res:// protocol does not cross privilege boundaries, since it is not allowed in the Internet Zone. Thus this might not be a vulnerability.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17435
http://archives.neohapsis.com/archives/fulldisclosure/2004-09/0639.html
http://archives.neohapsis.com/archives/fulldisclosure/2004-09/0629.html