Silverstripe <= v2.3.4: two XSS vulnerabilities

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Silverstripe CMS, http://silverstripe.org/, version 2.3.4 and lower and its unreleased 2.4 branch, is vulnerable to two Cross Site Scripting issues. 1. The comment posting mechanism of Silverstripe 'PostCommentForm' fails to properly sanitize the...