Cross-site scripting (XSS) vulnerability in valider_xml.php in SPIP 3.1.2 and earlier allows remote attackers to inject arbitrary web script or HTML via the var_url parameter in a valider_xml action.
https://core.spip.net/projects/spip/repository/revisions/23202
https://core.spip.net/projects/spip/repository/revisions/23201
https://core.spip.net/projects/spip/repository/revisions/23200
http://www.securityfocus.com/bid/93451
http://www.openwall.com/lists/oss-security/2016/10/12/7