Arbitrary Download of Images

This is a bug I found in flickr.

For example think I want to download this image.
https://www.flickr.com/photos/yuliatangled/5502737663/sizes/l
[code language=”html”]
www.flickr.com/photos/yuliatangled/5502737663/sizes/l
[/code]
The owner had disabled the download option to users.

But we can download by copying the image url and adding a “_d” at the end.
[code language=”html”]
farm6.staticflickr.com/5220/5502737663_a621e3ac95_b_d.jpg
[/code]
We can simply write an automated application such as flickr image downloader to download any image regardless of owner’s denial of download.

I reported it to Yahoo, but they said it’s a duplicate.