CVE-2025-58926 is a vulnerability classified as 'Improper Control of Filename for Include/Require Statement in PHP Program,' commonly known as a Local File Inclusion (LFI) vulnerability, found in the axiomthemes Cerebrum WordPress theme up to version 1.12. The issue arises because the theme improperly sanitizes or validates user-supplied input used in PHP include or require statements, allowing an attacker to manipulate the filename parameter to include arbitrary files from the local filesystem. This can lead to disclosure of sensitive files, execution of arbitrary PHP code, and ultimately full system compromise. The vulnerability has a CVSS v3.1 base score of 8.1, indicating high severity, with attack vector being network-based, no privileges or user interaction required, but with high attack complexity. The impact includes complete loss of confidentiality, integrity, and availability of the affected system. Although no public exploits are currently known, the vulnerability's nature and severity make it a critical risk for websites using the Cerebrum theme. The vulnerability was reserved in September 2025 and published in December 2025, with no patches currently linked, indicating that users should be vigilant for forthcoming updates. The vulnerability affects all versions up to 1.12, and since Cerebrum is a WordPress theme, it is primarily relevant to websites running WordPress CMS. Attackers exploiting this vulnerability can execute arbitrary PHP code remotely, potentially leading to website defacement, data theft, or pivoting to internal networks.

For European organizations, the impact of CVE-2025-58926 can be severe, especially for those relying on WordPress websites using the Cerebrum theme. Successful exploitation can lead to unauthorized access to sensitive data, including customer information, intellectual property, and internal documents, violating GDPR and other data protection regulations. It can also result in website defacement, loss of service availability, and reputational damage. Organizations in sectors such as e-commerce, government, healthcare, and finance, which often maintain public-facing WordPress sites, are at heightened risk. The ability to execute arbitrary code remotely without authentication means attackers can deploy malware, ransomware, or use the compromised server as a pivot point for further attacks within the corporate network. This could lead to broader network compromise and significant operational disruption. Additionally, the lack of current patches increases the window of exposure, making timely mitigation critical.

1. Monitor official axiomthemes channels and Patchstack for release of security patches addressing CVE-2025-58926 and apply updates immediately upon availability. 2. Until patches are available, consider disabling or removing the Cerebrum theme from production environments or replacing it with a secure alternative. 3. Implement strict input validation and sanitization at the web application firewall (WAF) level to block malicious requests attempting to exploit file inclusion. 4. Restrict PHP include paths and disable allow_url_include in PHP configuration to limit file inclusion scope. 5. Employ file integrity monitoring to detect unauthorized changes to theme files. 6. Conduct regular security audits and penetration testing focused on web application vulnerabilities. 7. Limit web server permissions to prevent unauthorized file access and execution. 8. Educate web administrators about the risks of using outdated or unsupported themes and plugins. 9. Use security plugins that can detect and block LFI attempts on WordPress sites. 10. Maintain comprehensive backups to enable rapid recovery in case of compromise.