CVE-2026-22495 identifies a Remote File Inclusion (RFI) vulnerability in the AncoraThemes Greenville WordPress theme, specifically versions up to and including 1.3.2. The vulnerability stems from improper validation or sanitization of user-controlled input used in PHP include or require statements. This flaw allows an attacker to specify a remote file URL that the PHP interpreter will include and execute within the context of the web server process. Such inclusion can lead to arbitrary code execution, enabling attackers to run malicious scripts, potentially leading to full system compromise, data theft, or website defacement. The vulnerability is categorized as a PHP Local File Inclusion issue but the description and naming indicate remote file inclusion capabilities, which are more severe. No CVSS score has been assigned yet, and no public exploits are known at this time. The affected product, Greenville, is a WordPress theme developed by AncoraThemes, commonly used for business and portfolio websites. The vulnerability affects all versions up to 1.3.2, with no patch links currently available. The issue was reserved in early 2026 and published in March 2026. The lack of authentication requirements and the ability to execute arbitrary code remotely make this a critical security flaw. The vulnerability arises from insecure coding practices where user input is directly used in include/require statements without proper validation or sanitization, violating secure coding standards for PHP applications.

The impact of CVE-2026-22495 is significant for organizations using the Greenville WordPress theme. Successful exploitation can lead to arbitrary code execution on the web server, which may allow attackers to take full control of the affected system. This can result in data breaches, website defacement, deployment of web shells, lateral movement within the network, and disruption of services. For e-commerce or business websites, this could mean loss of customer trust, financial damage, and regulatory penalties. Since WordPress powers a large portion of the web, and themes like Greenville are widely used, the scope of affected systems is potentially large. The vulnerability does not require authentication, increasing the risk of automated exploitation attempts. Although no exploits are currently known in the wild, the ease of exploitation and the critical nature of the flaw make it a high-risk threat. Organizations with public-facing WordPress sites using this theme are particularly vulnerable, especially if they have not applied updates or mitigations. The vulnerability also poses risks to hosting providers and managed WordPress service providers who may host multiple affected sites.

To mitigate CVE-2026-22495, organizations should immediately check if they are using the Greenville WordPress theme version 1.3.2 or earlier. If so, they should monitor AncoraThemes announcements for an official patch and apply it promptly once available. In the absence of an official patch, manual mitigation involves reviewing and modifying the theme’s PHP code to ensure that all include and require statements do not use user-controlled input or that such input is strictly validated and sanitized against a whitelist of allowed files. Disabling allow_url_include in the PHP configuration can prevent remote file inclusion, though this may impact legitimate functionality. Web application firewalls (WAFs) should be configured to detect and block suspicious requests attempting to exploit file inclusion vulnerabilities. Regular security scanning and monitoring for unusual file changes or web shell indicators are recommended. Additionally, restricting file permissions and isolating WordPress installations can limit the impact of a successful exploit. Organizations should also ensure that backups are current and tested for recovery in case of compromise.