Security Advisory
CVE-2017-20207
9.8
CRITICAL
Vulnerability Description
The Flickr Gallery plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.5.2 via deserialization of untrusted input from the `pager ` parameter. This allows unauthenticated attackers to inject a PHP Object. Attackers were actively exploiting this vulnerability with the WP_Theme() class to create backdoors.
Published Date
October 18, 2025
Official Source
NIST NVD Advisory