In Exponent CMS before 2.4.1 Patch #5, XSS in elFinder is possible in framework/modules/file/connector/elfinder.php.
https://github.com/exponentcms/exponent-cms/releases/tag/v2.4.1patch5
https://github.com/exponentcms/exponent-cms/commit/0b2241ff1c7d86376fa260c5d4c1714f6cef9c0f
http://www.securityfocus.com/bid/98043
http://www.exponentcms.org/news/patch-5-released-for-v2-4-1-to-fix-a-few-critical-issues