Forum OpenACS Development: YUI Vulnerability

Posted by Michael Aram on
October 30, 2012 -- A XSS vulnerability has been discovered in some YUI 2 .swf files from versions 2.4.0 through 2.9.0. This defect allows JavaScript injection exploits to be created against domains that host affected YUI .swf files. This vulnerability is similar to, but not the same as, the vulnerability that was announced in 2010.


I have drawn a sample and downloaded the charts.swf that is currently checked in in ajaxhelper. It turns out that it is an affected version (md5 checksum is listed as affected).

So, firstly, the files in CVS should be patched. Secondly, everyone who has these files on their servers should upgrade, whether or not these components are used!

All the best,

2: Re: YUI Vulnerability (response to 1)
Posted by Gustaf Neumann on
Thanks for the report. I've updated CVS HEAD and the oacs-5-9 branch and bumped the version numbers, such that users of APM can get these changes smoothly.

The general recommendation is to consider the phase out of YUI in OpenACS applications since the development of YUI has stopped (in 2014, [1,2]).