BaseFortify

Publication date: 2025-10-18

Last updated on: 2026-01-05

Assigner: Wordfence

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-18

Last Modified

2026-01-05

Generated

2026-07-06

AI Q&A

2025-10-18

EPSS Evaluated

2026-07-05

NVD

CVE-2017-20207

Affected Vendors & Products

Vendor	Product	Version / Range
dancoulter	flickr_gallery	to 1.5.2 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

This vulnerability is a PHP Object Injection in the Flickr Gallery plugin for WordPress (versions up to and including 1.5.2). It occurs because the plugin deserializes untrusted input from the 'pager' parameter, allowing unauthenticated attackers to inject malicious PHP objects. Attackers exploited this by using the WP_Theme() class to create backdoors.

Impact Analysis

The vulnerability can have severe impacts including unauthorized remote code execution, creation of backdoors, and full compromise of the affected WordPress site. Since it allows unauthenticated attackers to inject PHP objects, it can lead to complete control over the site, data theft, and service disruption.

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