You would think you could inject a closing frameset followed by a script block but that would be too easy.

It occurs within a frameset but before a body tag with equals filtered. We received a request from twitter about this next lab. Injection occurs inside a frameset but before the body It's all well and good executing JavaScript but if all you can do is call alert what use is that? In this lab we demonstrate the shortest possible way to execute arbitrary code.Īttribute context length limit arbitrary codeĪgain calling alert proves you can call a function but we created another lab to find the shortest possible attribute based injection with arbitrary JavaScript. Do you think you can beat it?īasic context length limit, arbitrary code We came up with a vector that executes JavaScript in 15 characters:'oncut=alert``+ the plus is a trailing space. The context of this lab inside an attribute with a length limitation of 14 characters. Filedescriptor came up with a vector that could execute JavaScript in 16 characters:

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