CVE-2026-66565
CriticalCVSS 9.8Summary
The WordPress theme FC United in versions up to 1.1.1 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
Risk Assessment
The vulnerability allows an unauthenticated attacker to exploit it remotely, potentially leading to full compromise of the WordPress site. Organizations using this theme are at risk of compromise.
Recommendation
Update the FC United theme to the latest version that fixes the vulnerability. If updating is not possible, consider disabling or replacing the theme.
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Original NVD description (English source)
Unauthenticated PHP Object Injection in FC United <= 1.1.1 versions.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS