CVE-2025-49507 CRITICAL

CVE-2025-49507: WordPress CozyStay theme < 1.7.1 - PHP Object Injection vulnerability

Vendor Loftocean

Product CozyStay

Weakness CWE-502 · Unsafe deserialization

Published June 10, 2025

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

9.8/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality High

Integrity High

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

01Description

Deserialization of Untrusted Data vulnerability in LoftOcean CozyStay cozystay allows Object Injection.This issue affects CozyStay: from n/a through < 1.7.1.

Explanation of Vulnerability in Simple Terms

02Summary

CozyStay versions 1.7.1 and earlier contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on affected systems. The vulnerability exists in how the application processes untrusted serialized data without proper validation. An attacker can exploit this remotely over the network without requiring authentication or user interaction to compromise the entire system.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the server, read/modify all data, and take full control of the site.

Potential impact on your site

04Site Impact

Complete system compromise: attackers can steal data, modify content, install backdoors, or shut down the site.

Conditions required to exploit

05Prerequisites

Network access to the vulnerable CozyStay instance; no authentication or user interaction required.

Key dates

06Disclosure timeline

June 10, 2025 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-49507 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

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