CVE-2026-65556 CRITICAL

CVE-2026-65556: WordPress WPBruiser {no- Captcha anti-Spam} plugin <= 3.1.43 - PHP Object Injection vulnerability

Vendor Mihche
Product WPBruiser {no- Captcha anti-Spam}
Weakness CWE-502 · Unsafe deserialization
Published August 6, 2026
Last update August 6, 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 WPBruiser {no- Captcha anti-Spam} <= 3.1.43 versions.

Explanation of Vulnerability in Simple Terms

02Summary

WPBruiser versions up to 3.1.43 contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on affected WordPress sites. The plugin unsafely deserializes untrusted data without proper validation. No user interaction is required; exploitation can occur over the network. A patch version has not been publicly identified.

What an attacker can do

03Attacker Capabilities

Run arbitrary PHP code on the 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 take the site offline.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

August 6, 2026 CVE published
August 6, 2026 Record updated

Related vulnerabilities

08Related CVE

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