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Copy paste following in browser bar,

http://stackoverflow.com/questions/ask?title=test"><script>alert(1)</script>"&tags="></a></div><script>alert(/1/)</script><foo+bar="

or

test link (might work, but not sure)

  • but firefox 3.6 without noscript, executed my xss.
  • opera 11, executed my xss
  • chrome somehow does not execute alert, but UI is broken,

Found out tag description field is not html escaped.

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1  
Confirmed in Chrome 10 on Windows 7. Great catch. –  Pëkka Mar 12 '11 at 18:38
2  
No repro in Chrome 11 dev, but reproduced in Firefox 4's latest nightly. (Windows 7) –  nyuszika7h Mar 12 '11 at 18:40
    
I did get an alert in Chrome 9, Gentoo. Did Chrome add fanciness to detect stuff like this? –  Michael Mrozek Mar 12 '11 at 18:49
    
@Michael, I don't know but In html source, there is plain <script tag, but somehow, my chrome 11 also can't get executed somehow. –  YOU Mar 12 '11 at 18:54
    
Does not give an alert in Chrome 10 on Mac OS X. –  Felix Mar 12 '11 at 18:57
    
@Michael I've turned on XSS protection in about:flags, though it disappeared in Chrome 11. –  nyuszika7h Mar 12 '11 at 18:59
1  
@Nyuszika7H, does the bounty imply this still needs fixing? –  Arjan Apr 26 '11 at 20:32
    
@Arjan Nope, I just wanted to give some credit to balpha for that Hacker badge, even if it's not real! :) –  nyuszika7h Apr 27 '11 at 5:21
    
@YOU Confirmed in Firefox 4 on Mac. With NoScript turned on, it's detected at as an XSS attempt as well. –  Blowski Apr 27 '11 at 16:30
    
@Blowski, Actually, this supposed to be fixed already. Edit: Checked and confirmed on my firefox with NoScript too. Probably NoScript alerting everything with <script> tag in url –  YOU Apr 27 '11 at 16:31
    
@YOU Yes, just checked with NoScript disabled and it's fine. Good to know that's what NoScript does... –  Blowski Apr 27 '11 at 16:38

1 Answer 1

up vote 9 down vote accepted
+100

Just imagine it's a real one – it's for you:

Hacker badge

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2  
cool!, very quick response, thanks, I now like to have that badge :D –  YOU Mar 12 '11 at 18:59
4  
Hm, so alert(false) doesn't count for the Hacker badge? –  badp Mar 13 '11 at 13:45

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