Xitami Web Server is "a small, fast, and powerful multiplatform Open Source Web Server". Multiple format string vulnerabilities have been found in Xitami. These vulnerabilities exist because of the way xitami uses the SMT kernel (Simple Multi Threading kernel - another iMatix product): some user supplied data is directly passed to the vsnprintf() and vsprintf() functions inside the sendfmt() function of the SMT kernel.
http://www.securiteam.com/securitynews/5AP091PO0W.html
