SPIP 1.8.2-e and earlier and 1.9 Alpha 2 (5539) and earlier allows remote attackers to obtain sensitive information via a direct request to inc-messforum.php3, which reveals the path in an error message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24399
http://www.zone-h.org/en/advisories/read/id=8650/