Google Chrome before 13.0.782.107 does not ensure that extension installations are confirmed by a browser dialog, which makes it easier for remote attackers to modify the product's functionality via a Trojan horse extension.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14425
https://exchange.xforce.ibmcloud.com/vulnerabilities/68940
http://googlechromereleases.blogspot.com/2011/08/stable-channel-update.html