Google reader is supposed to display only content that the user has subscribed to however two vulnerabilities has been identified which may allow an attacker to entice it’s victim (using the Google reader service) to view unwanted web content carrying malicious payloads.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/44161/googleReader.txt
Source: https://packetstormsecurity.com/files/44161/googleReader.txt.html