Multiple cross-site scripting (XSS) vulnerabilities in Chyrp before 2.1.2 and before 2.5 Beta 2 allow remote attackers to inject arbitrary web script or HTML via the (1) content parameter to includes/ajax.php or (2) body parameter to includes/error.php.
https://github.com/vito/chyrp/commit/f69bd791c37e0b154c0bda16f9759ba19cc77f6c