SPIP 3.1.x suffer from a Reflected Cross Site Scripting Vulnerability in /ecrire/exec/infoplugin.php involving the $plugin parameter, as demonstrated by a /ecrire/?exec=infoplugin URL.
$plugin
{ "urgency": "not yet assigned" }
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2016-9998.json"