published November 24, 2015
NVD has not assigned a CVSS score to this record. It sits in the 99.6th percentile for exploit probability.
The vB_Api_Hook::decodeArguments method in vBulletin 5 Connect 5.1.2 through 5.1.9 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object in the arguments parameter to ajax/api/hook/decodeArguments.