High severity · published Jun 15, 2026
CVE-2026-39478
WordPress Anti-Malware Security and Brute-Force Firewall plugin <= 4.23.87 - PHP Object Injection vulnerability
8.8
CVSS
0.4%
EPSS
No
On KEV
Description
Contributor PHP Object Injection in Anti-Malware Security and Brute-Force Firewall <= 4.23.87 versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Anti-Malware Security and Brute-Force Firewall · Eli Scheetz
through 4.23.87 · source: vendor
Affected product
AS
Anti-Malware Security and Brute-Force Firewall
Eli Scheetz
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39478
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39478
patchstack.com
https://patchstack.com/database/wordpress/plugin/gotmls/vulnerability/wordpress-anti-malware-security-and-brute-force-firewall-plugin-4-23-87-php-object-injection-vulnerability?_s_id=cve
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