What the vulnerability does
01Description
The CozyStay and TinySalt plugins for WordPress are vulnerable to PHP Object Injection in all versions up to, and including, 1.7.0, and in all versions up to, and including 3.9.0, respectively, via deserialization of untrusted input in the 'ajax_handler' function. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Explanation of Vulnerability in Simple Terms
02Summary
The CozyStay hotel booking theme for WordPress contains a deserialization vulnerability in versions up to 1.7.0. An attacker can send a specially crafted request over the network to deserialize untrusted data, leading to remote code execution. No authentication or user interaction is required. This allows complete compromise of the WordPress site.
What an attacker can do
03Attacker Capabilities
Run arbitrary PHP code on the site and take full control of it.
Potential impact on your site
04Site Impact
Complete site compromise: attacker can steal data, modify content, create admin accounts, or inject malware.
Conditions required to exploit
05Prerequisites
Network access to the site; no authentication or user interaction needed.
Key dates
06Disclosure timeline
March 19, 2025
CVE published
April 8, 2026
Record updated
