CVE-2014-9714: Facebook Hiphop Virtual Machine

Medium severity, CVSS 4.3. EPSS: 2.1% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the WddxPacket::recursiveAddVar function in HHVM (aka the HipHop Virtual Machine) before 3.5.0 allows remote attackers to inject arbitrary web script or HTML via a crafted string to the wddx_serialize_value function.

Affected products

• Facebook Hiphop Virtual Machine: up to and including 3.4.2

Published 2015-04-13. Last modified 2026-06-17.