CVE-2016-2049: Janrain PHP-Openid

High severity, CVSS 8.8. EPSS: 2.2% chance of exploitation in the next 30 days.

examples/consumer/common.php in JanRain PHP OpenID library (aka php-openid) improperly checks the openid.realm parameter against the SERVER_NAME element in the SERVER superglobal array, which might allow remote attackers to hijack the authentication of arbitrary users via vectors involving a crafted HTTP Host header.

Affected products

• Janrain PHP-Openid: any version

Published 2016-02-01. Last modified 2026-06-17.