I have requested the Webmasters to clarify this query about photos. Please wait for their response.
However, don't confuse it with using photos from other blogs by giving them credit. That can only be done after taking due permissions from them. These photos are not under creative commons licensing and can't be used as such.
Your point is very clear. But I am asking about posting photos from Wikipedia commons by giving attribution to the original page. It is very legal one.