CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What the vulnerability does
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.
Explanation of Vulnerability in Simple Terms
Flickr Gallery before version 1.5.3 deserializes untrusted data without validation, allowing an attacker to run arbitrary code on the site. No authentication or user interaction is required. An attacker can exploit this remotely over the network to gain full control of the affected installation.
What an attacker can do
Run their own code on the site and take complete control of it.
Potential impact on your site
Complete compromise of the site, including data theft, malware injection, and site defacement.
Conditions required to exploit
Network access to the site; no authentication or user interaction required.
Key dates
External resources
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