CVE-2026-57677 CRITICAL

CVE-2026-57677: WordPress Novalnet Payment Gateway for WooCommerce plugin <= 12.10.3 - PHP Object Injection vulnerability

Vendor Novalnet
Product Novalnet Payment Gateway for WooCommerce
Weakness CWE-502 · Unsafe deserialization
Published July 2, 2026
Last update July 2, 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

Unauthenticated PHP Object Injection in Novalnet Payment Gateway for WooCommerce <= 12.10.3 versions.

Explanation of Vulnerability in Simple Terms

02Summary

The Novalnet Payment Gateway for WooCommerce versions up to 12.10.3 contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on the site. The vulnerability exists in how the plugin processes untrusted serialized data without proper validation. No user interaction is required to exploit this issue.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on your site and take complete control of it.

Potential impact on your site

04Site Impact

Complete site compromise: attackers can steal data, modify content, install malware, or shut down your store.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

July 2, 2026 CVE published