Why is Opera executing javascript from stackoverflow comment?
I noticed weird opera activity, especially when I killed the browser with open tabs and started it again, and executed js from this page: display a message in asp.net And I saw the "Login successfully" warning
This happens every time I force a restart.
How is this possible?
I am using Opera 24.0.1558.61 Win8.1 x64
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It turns out it's not caused by Opera at all. It was a faulty third party extension that breaks on this website. The same extension breaks the same way in other supported browsers under given conditions.
If you discover a security vulnerability in Opera, you can confidentially report it to the Opera bug tracker. We would be happy to thank you for responsible disclosure if we find it usable.
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