CVE-2017-20207
Flickr Gallery <= 1.5.2 - Unauthenticated PHP Object Injection
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-502 |
| Vendor | dan coulter |
| Product | flickr gallery |
| Published | Oct 18, 2025 |
| Last Updated | Apr 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for dan coulter flickr gallery
Be the first to know when new critical vulnerabilities affecting dan coulter flickr gallery are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Dan Coulter / Flickr Gallery
0 < 1.5.3
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/b52ae51d-7b9a-4047-82bf-723ea87d2375?source=cve wordfence.com: https://www.wordfence.com/blog/2017/10/3-zero-day-plugin-vulnerabilities-exploited-wild/ plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/1737576/flickr-gallery
Credits
Matt Barry