Expl0ited, пруф - http://en.wikipedia.org/wiki/URI_scheme

The query is an optional part, separated by a question mark ("?"), that contains additional identification information that is not hierarchical in nature. The query string syntax is not generically defined, but it is commonly organized as a sequence of = pairs, with the pairs separated by a semicolon or an ampersand. For example:

Semicolon: key1=value1;key2=value2;key3=value3

Ampersand: key1=value1&key2=value2&key3=value3​

http://tools.ietf.org/html/rfc1866