CVE-2026-27340 is a vulnerability classified as improper control of filename for include/require statements in PHP, specifically in the AncoraThemes Apollo | Night Club, DJ Event WordPress Theme up to version 1.3.1. This vulnerability allows remote file inclusion (RFI), where an attacker can manipulate the filename parameter used in PHP include or require functions to load and execute arbitrary PHP code from a remote server. This occurs because the theme does not properly validate or sanitize user-controlled input that determines which files are included. Exploiting this vulnerability can lead to remote code execution, enabling attackers to run malicious scripts on the server, potentially leading to full site compromise, data theft, defacement, or pivoting to other internal systems. Although no exploits are currently known in the wild, the vulnerability is publicly disclosed and poses a significant risk to sites using this theme. The vulnerability affects all versions up to and including 1.3.1, and no official patch links are currently provided. The vulnerability was reserved and published in early 2026, with the source attribution to Patchstack. Given the nature of WordPress themes and their widespread use, this vulnerability could be leveraged by attackers targeting entertainment, event management, and nightlife-related websites that use this theme.

The primary impact of this vulnerability is the potential for remote code execution on affected WordPress sites, which can lead to complete site takeover. Attackers can execute arbitrary PHP code, allowing them to install backdoors, steal sensitive data such as user credentials or payment information, deface websites, or use the compromised server as a pivot point for further attacks within an organization's network. This can severely damage the reputation of affected organizations, cause financial losses, and disrupt business operations. Since WordPress powers a significant portion of websites globally, and themes are a common attack vector, the scope of impact could be broad, especially for organizations relying on the Apollo theme for event promotion. The lack of authentication requirements for exploitation increases the risk, as attackers can exploit this remotely without needing valid credentials. The vulnerability also threatens the confidentiality, integrity, and availability of affected systems.

Organizations using the AncoraThemes Apollo | Night Club, DJ Event WordPress Theme should immediately monitor for updates or patches from the vendor and apply them as soon as they become available. Until a patch is released, administrators should consider disabling or removing the vulnerable theme to prevent exploitation. As a temporary workaround, review and harden the PHP code by implementing strict input validation and sanitization on any parameters used in include or require statements to prevent remote file inclusion. Employ web application firewalls (WAFs) with rules designed to detect and block RFI attempts targeting PHP include functions. Regularly audit WordPress installations and plugins/themes for vulnerabilities and maintain backups to enable rapid recovery if compromise occurs. Additionally, restrict file permissions on the server to limit the ability of attackers to upload or execute unauthorized files. Monitoring web server logs for suspicious requests related to file inclusion attempts can help detect exploitation attempts early.