CVE-2017-20207
Unknown Unknown - Not Provided
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.
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Meta Information
Published
2025-10-18
Last Modified
2026-01-05
Generated
2026-06-16
AI Q&A
2025-10-18
EPSS Evaluated
2026-06-14
NVD
CVE-2017-20207
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
dancoulter flickr_gallery to 1.5.2 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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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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