Contributor PHP Object Injection in Anti-Malware Security and Brute-Force Firewall

Publication date: 2026-06-15

Last updated on: 2026-06-15

Assigner: Patchstack

Description

Contributor PHP Object Injection in Anti-Malware Security and Brute-Force Firewall <= 4.23.87 versions.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-15

Last Modified

2026-06-15

Generated

2026-07-06

AI Q&A

2026-06-16

EPSS Evaluated

2026-07-04

NVD

CVE-2026-39478

Affected Vendors & Products

Vendor	Product	Version / Range
patchstack	anti-malware_security_and_brute-force_firewall	to 4.23.87 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

This vulnerability is a PHP Object Injection issue found in the Anti-Malware Security and Brute-Force Firewall plugin versions up to and including 4.23.87. PHP Object Injection occurs when untrusted user input is unserialized, allowing an attacker to inject malicious objects that can lead to unexpected behavior in the application.

Impact Analysis

The vulnerability has a high severity with a CVSS base score of 8.8, indicating it can have a significant impact. It allows an attacker with low privileges to execute code remotely without user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability of the affected system.

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