CVE-2025-6326 is a vulnerability classified as Improper Control of Filename for Include/Require Statement in PHP programs, specifically affecting the AncoraThemes Inset WordPress theme up to version 1.18.0. This vulnerability enables Remote File Inclusion (RFI), a critical security flaw where an attacker can manipulate the filename parameter used in PHP include or require statements to load and execute arbitrary remote code. The root cause is insufficient validation or sanitization of user-supplied input controlling the file path, allowing an attacker to specify a remote URL or local file that the PHP interpreter will include and execute. Exploitation requires no authentication or user interaction and can be performed remotely over the network, making it highly accessible to attackers. The CVSS 3.1 base score of 8.1 reflects high impact on confidentiality, integrity, and availability, as successful exploitation can lead to full system compromise, data theft, defacement, or denial of service. Although no public exploits are currently known, the vulnerability is publicly disclosed and documented, increasing the risk of future exploitation. The affected product, AncoraThemes Inset, is a WordPress theme used by websites to manage content presentation, meaning compromised sites could serve malicious content or be leveraged as attack platforms. The lack of available patches at the time of disclosure necessitates immediate risk mitigation through configuration hardening and monitoring.

For European organizations, this vulnerability poses a significant threat to websites running the AncoraThemes Inset theme, potentially leading to unauthorized remote code execution. This can result in data breaches exposing sensitive customer or business information, website defacement harming brand reputation, and service disruptions impacting business continuity. Attackers could use compromised sites as pivot points to infiltrate internal networks or distribute malware to visitors. Given the widespread use of WordPress across Europe, especially in sectors like e-commerce, media, and government, the impact could be broad and severe. Organizations with limited patch management capabilities or those relying on third-party themes are particularly vulnerable. The high CVSS score indicates that exploitation could lead to complete system compromise without requiring user interaction, increasing the urgency for European entities to address this threat proactively.

1. Monitor AncoraThemes and official WordPress theme repositories for patches addressing CVE-2025-6326 and apply updates immediately upon release. 2. In the interim, restrict PHP include paths by configuring 'allow_url_include' to 'Off' in php.ini to prevent remote file inclusion. 3. Implement strict input validation and sanitization on any user-supplied parameters that influence file inclusion logic, if customization is possible. 4. Deploy Web Application Firewalls (WAFs) with rules to detect and block suspicious requests attempting to exploit file inclusion vulnerabilities. 5. Conduct regular security audits and code reviews of custom themes and plugins to identify similar vulnerabilities. 6. Use security plugins that monitor file integrity and alert on unauthorized changes. 7. Limit permissions on web server directories to prevent unauthorized file uploads or modifications. 8. Educate web administrators on the risks of using outdated or untrusted themes and encourage minimal use of third-party themes without active support.