An unspecified vulnerabilities were found in KP iLO. By exploiting these vulnerabilities malicious users can gain privileges, bypass security restrictions, cause denial of service or execute arbitrary code. These vulnerabilities can be exploited remotely via an unknwon versions.

HP Integrated Lights-Out firmware 2 versions earlier than 2.27
HP Integrated Lights-Out firmware 3 versions earlier than 1.82
HP Integrated Lights-Out firmware 4 versions earlier than 2.10 

Install patches released by vendor

HP advisory
HP advisory