CVE-2025-52740 HIGH

CVE-2025-52740: WordPress Boldermail Plugin <= 2.4.0 - PHP Object Injection Vulnerability

Vendor Hernan Villanueva
Product Boldermail
Weakness CWE-502 · Unsafe deserialization
Published October 22, 2025
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in Hernan Villanueva Boldermail boldermail allows Object Injection.This issue affects Boldermail: from n/a through <= 2.4.0.

Explanation of Vulnerability in Simple Terms

02Summary

Boldermail versions up to 2.4.0 contain a deserialization vulnerability that allows authenticated attackers to execute arbitrary code on the server. The vulnerability exists in how the application processes untrusted serialized data without proper validation. An attacker with low-level access can craft malicious input to trigger code execution with full system privileges.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the server with full system access.

Potential impact on your site

04Site Impact

Complete compromise of the server; attacker can read, modify, or delete all data and install backdoors.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege account or valid authentication to the application.

Key dates

06Disclosure timeline

October 22, 2025 CVE published
April 28, 2026 Record updated