An interesting way to determine if you are logged into social web sites ✩ Mozilla Hacks – the Web developer blog
Thanks! Please check your inbox to confirm your subscription. If you haven’t previously confirmed a subscription to a Mozilla-related newsletter you may have to do so. Please check your inbox or your spam filter for an email from us. Jan! You could upload an image to a security-sensitive bug in Bugzilla to check if a user is logged in as a member of the security group, but this would change over t
Abusing HTTP Status Codes to Expose Private Information - Grepular
Abusing HTTP Status Codes to Expose Private InformationWritten 14 years ago by Mike Cardwell Update: Some of the example tests on this page no longer work (I don’t have a Facebook account anymore and the Twitter URL I used went offline). The technique it’s self is still alive and relevant though. When you visit my website, I can automatically and silently determine if you’re logged into Facebook,
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