Please review this (very rare) Dojo security advisory and take action immediately to protect yourself and your clients if you have Dojo 0.4 through Dojo 1.4 installed on your site.
From the advisory:
If you have Dojo 0.4 through Dojo 1.4 installed on your site, you are strongly encouraged to read all of this message and take immediate action.
We recently had a security review done on the Dojo codebase, and some issues were discovered. Most of the issues were in test files or related PHP files, but there were some issues discovered with a few files used by modules. You are strongly encouraged to remove some files immediately to give yourself the best protection. While we are not aware of any specific exploits, we take security issues very seriously and we encourage you to take quick preventative action.