Talk:Punycode
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First, the linked "Punycode Exploit" should link to the advisory text, not the simple demonstration page. Secondly, this is not an exploit of punycode so much as it is an exploit of the fact that not running domain names through nameprep is asking for spoofing problems.
I would change the paragraph from:
Punycode is easily exploitable, and for an example see Punycode exploit
to:
Note that browsers which fail to run a string through nameprep before using it as a DNS name are vulnerable to spoofing exploits, as in Punycode spoof.
With the last two words an external link to the exploit.