Tuesday, 1 March 2016

XSS in SteamCommunity

This is My Second Writeup ,An old finding of mine.
So,this was year 2013 ,I guess Dec was the month. I was new to Bug hunting at that time. A starter in this field. I was searching around to hunt a site. Then I said why don't I try Steam. Its a big company surely it would have bugs in their services and probably they would reward (At that time Valve had no Proper Security Program). So I tested their main domain and no luck.

Then I tried

http://steamcommunity.com

Luckily the search Bar was vulnerable to XSS and simple XSS vector

"><img src=x onerror=prompt(1)>"

got executed






POC...


So Reported it and After 2-3 days Devs Replied ,confirming the Vulnerability. And Devs be like


So,I dig deeper and found 4 more XSS bugs and reported them.Their Response was quick and appreciable.

So as a Reward got some Swags and a Complete Valve game Bundle.



Muhammad Abdullah

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