Anti-Malware Security and Brute-Force Firewall <= 4.23.87 - Authenticated (Contributor+) PHP Object Injection

Wordfence Intelligence   >   Vulnerability Database   >   Anti-Malware Security and Brute-Force Firewall <= 4.23.87 - Authenticated (Contributor+) PHP Object Injection
7.5
Deserialization of Untrusted Data
CVE CVE-2026-39478
CVSS 7.5 (High)
Publicly Published April 20, 2026
Last Updated April 30, 2026
Researcher daroo

Description

The Anti-Malware Security and Brute-Force Firewall plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.23.87 via deserialization of untrusted input. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

References

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Vulnerability Details for Anti-Malware Security and Brute-Force Firewall

Anti-Malware Security and Brute-Force Firewall

Software Type Plugin
Software Slug gotmls (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.23.88, or a newer patched version
Affected Version
  • <= 4.23.87
Patched Version
  • 4.23.88

Recent vulnerabilities in Anti-Malware Security and Brute-Force Firewall

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Anti-Malware Security and Brute-Force Firewall <= 4.21.85 - Authenticated (Admin+) PHP Object Injection
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CVE-2022-4327
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Researcher: thinhnguyen1337
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Researcher: Taurus Omar
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Anti-Malware Security and Brute-Force Firewall <= 4.15.17 - Cross-Site Scripting
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Anti-Malware Security and Brute-Force Firewall <= 4.15.22 - Cross-Site Request Forgery
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CVE ID Unknown
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Researcher: James Hooker
Anti-Malware Security and Brute-Force Firewall <= 4.15.22 - Cross-Site Scripting
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CVE ID Unknown
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# Title CVE ID CVSS Researchers Date
1 Anti-Malware Security and Brute-Force Firewall <= 4.23.89 - Unauthenticated Stored Cross-Site Scripting CVE-2026-57691 7.2 dutafi July 9, 2026
2 Anti-Malware Security and Brute-Force Firewall <= 4.23.81 - Missing Authorization to Authenticated (Subscriber+) Arbitrary File Read CVE-2025-11705 6.5 Dmitrii Ignatyev October 28, 2025
3 Anti-Malware Security and Brute-Force Firewall <= 4.21.96 - Unauthenticated Remote Code Execution CVE-2024-22144 9.0 stealthcopter March 12, 2024
4 Anti-Malware Security and Brute-Force Firewall <= 4.21.85 - Authenticated (Admin+) PHP Object Injection CVE-2022-4327 7.2 thinhnguyen1337 December 21, 2022
5 Anti-Malware Security and Brute-Force Firewall <= 4.20.95 - Reflected Cross-Site Scripting CVE-2022-0953 6.1 Taurus Omar April 11, 2022
6 Anti-Malware Security and Brute-Force Firewall <= 4.21.74 - Reflected Cross-Site Scripting CVE-2022-2599 6.1 Krzysztof Zając February 8, 2022
7 Anti-Malware Security and Brute-Force Firewall <= 4.20.93 - Reflected Cross-Site Scripting CVE-2021-25101 6.1 ZhongFu Su January 24, 2022
8 Anti-Malware Security and Brute-Force Firewall <= 4.15.17 - Cross-Site Scripting 7.2 Tim Coen May 10, 2016
9 Anti-Malware Security and Brute-Force Firewall <= 4.15.22 - Cross-Site Request Forgery 3.1 James Hooker May 25, 2015
10 Anti-Malware Security and Brute-Force Firewall <= 4.15.22 - Cross-Site Scripting 6.1 James Hooker May 25, 2015
View more vulnerabilities in this software package View more vulnerabilities

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