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Yourls 1.7 Cross Site Scripting

Posted on 28 October 2014

Hello, I found a xss stored vulnerability in Yourls 1.7 script (latest version). The attacker can steal the admin's cookies and login in the admin panel. Note: Only the admin can see this. Steps to perform the vulnerability: 1. Create a new url to shorten --> In the inputs you need write this payload --> anything"><img src=x onerror=prompt(1)>* * Javascript code to inject. 2. Click in the button "Shorten" 3. Wait until the administrator logs in the admin panel Screenshoots: 1. http://i.imgur.com/G4r6uV0.png 2. http://i.imgur.com/jhGR4n2.png 3. http://i.imgur.com/gQYSqgt.png Thank You, Kind Regards.

 

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