CVE-2014-2209: Facebook Hiphop Virtual Machine

Medium severity, CVSS 5.0. EPSS: 2.1% chance of exploitation in the next 30 days.

Facebook HipHop Virtual Machine (HHVM) before 3.1.0 does not drop supplemental group memberships within hphp/util/capability.cpp and hphp/util/light-process.cpp, which allows remote attackers to bypass intended access restrictions by leveraging group permissions for a file or directory.

Affected products

• Facebook Hiphop Virtual Machine: up to and including 3.0.1

Published 2014-12-28. Last modified 2026-06-17.