John Cox has this new post today with an up-close look at one of the PHP application issues highlighted by the PHP Security Consortium - one dealing with vTiger.
Interesting security notice via PHPSec on vTiger (open source customer relationship management system). Beyond the normal XSS vulnerabilities that were reported was an interesting topic of an exploit that I had not given much thought to before.
The method he refers to here deals with vTigers ability to read in RSS blogs, but no checking is done. Thus, a malicious user could enter "crap" into the blog and trick someone using vTiger to read it in. This "RSS attack" isn't something new, but it doesn't get a lot of press. It should, however, be paid attention to, since the results could be quite detrimential to you and your site...