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parsedown/test/data/xss_bad_url.html

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according to https://tools.ietf.org/html/rfc3986#section-3 the colon is a required part of the syntax, other methods of achieving the colon character (as to browser interpretation) should be taken care of by htmlencoding that is done on all attribute content
2017-05-09 21:37:13 +03:00
<p><a href="javascript%3Aalert(1)">xss</a></p>
<p><a href="javascript%3Aalert(1)">xss</a></p>
<p><a href="javascript%3A//alert(1)">xss</a></p>
<p><a href="javascript&amp;colon;alert(1)">xss</a></p>
<p><img src="javascript%3Aalert(1)" alt="xss" /></p>
<p><img src="javascript%3Aalert(1)" alt="xss" /></p>
<p><img src="javascript%3A//alert(1)" alt="xss" /></p>
<p><img src="javascript&amp;colon;alert(1)" alt="xss" /></p>
<p><a href="data%3Atext/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==">xss</a></p>
<p><a href="data%3Atext/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==">xss</a></p>
<p><a href="data%3A//text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==">xss</a></p>
<p><a href="data&amp;colon;text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==">xss</a></p>
<p><img src="data%3Atext/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==" alt="xss" /></p>
<p><img src="data%3Atext/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==" alt="xss" /></p>
<p><img src="data%3A//text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==" alt="xss" /></p>
<p><img src="data&amp;colon;text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==" alt="xss" /></p>
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