Опера 12 вроде не была подвержена данной уязвимости.
“The standalone auto updater for Opera 12 on Windows was vulnerable to a Heartbleed attack from someone who would be in possession of a valid Opera certificate. While fixing this, we also found another issue with our auto update on Windows which might be exploited by someone in possession of such a certificate. Successful exploitation, which would require using a third, unrelated bug on Windows, could allow a mischievous man in the middle to run arbitrary code on the computer. Opera 12.17 is therefore a recommended security upgrade on Windows. While it is unlikely that someone has gained access to a certificate of ours, we cannot rule out that some foreign intelligence agency has done so, and we want to be on the safe side.”