Cross-site request forgery (CSRF) vulnerability in ecrire/exec/valider_xml.php in SPIP 3.1.2 and earlier allows remote attackers to hijack the authentication of administrators for requests that execute the XML validator on a local file via a crafted valider_xml request. NOTE: this issue can be combined with CVE-2016-7998 to execute arbitrary PHP code.
https://core.spip.net/projects/spip/repository/revisions/23203
https://core.spip.net/projects/spip/repository/revisions/23202
https://core.spip.net/projects/spip/repository/revisions/23201
http://www.securityfocus.com/bid/93451
http://www.openwall.com/lists/oss-security/2016/10/12/6