Tuesday, June 10, 2014

MPOS (cryptocurrencies mining portal) XSS

During another "sprint code review" session I found a simple XSS in MPOS JSONP handling. MPOS is a web based mining portal for various crypto currencies written in PHP.

Vulnerable is callback parameter introduced in this commit. (note: Content-Type response header is text/html)

Attacker needs a valid api key. Usually he can get it by just signing up to a pool.


Found and reported: 25.05.2014
Fixed: 10.06.2014

Ps. It was introduced after more or less security-related discussion here.


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