CVE-2026-28057 is a Local File Inclusion (LFI) vulnerability found in the ThemeREX Mandala WordPress theme, affecting versions up to 2.8. The vulnerability arises from improper control over the filename parameter used in PHP include or require statements. This flaw allows an attacker to manipulate the input to these statements, causing the application to include unintended files from the local filesystem. Such an inclusion can lead to arbitrary code execution, disclosure of sensitive files (such as configuration files containing database credentials), or further exploitation of the server environment. The vulnerability is categorized as a PHP Remote File Inclusion type but specifically manifests as Local File Inclusion in this case. No CVSS score has been assigned yet, and no patches or known exploits are currently documented. The issue was reserved and published in early 2026, indicating recent discovery. The lack of proper input validation or sanitization in the Mandala theme’s codebase is the root cause. This vulnerability is critical in environments where the theme is actively used, especially on publicly accessible WordPress sites, as it can be exploited remotely without authentication or user interaction.

The impact of CVE-2026-28057 is significant for organizations using the ThemeREX Mandala theme. Successful exploitation can lead to unauthorized disclosure of sensitive information, including server files and credentials, which can compromise the confidentiality of data. Attackers may also execute arbitrary code, leading to full system compromise, data tampering, or service disruption, affecting integrity and availability. This can result in website defacement, data breaches, or use of the compromised server as a pivot point for further attacks within an organization’s network. Given the widespread use of WordPress globally, organizations relying on this theme for their websites or client portals face increased risk. The absence of authentication or user interaction requirements makes the vulnerability easier to exploit, increasing the threat level. Additionally, the lack of a patch at the time of disclosure leaves many sites exposed, potentially leading to increased attack attempts once the vulnerability becomes widely known.

To mitigate CVE-2026-28057, organizations should immediately audit their WordPress installations to identify the use of the ThemeREX Mandala theme, especially versions up to 2.8. Until an official patch is released, administrators should implement strict input validation and sanitization on any parameters that influence file inclusion paths, ensuring only allowed files can be included. Employing Web Application Firewalls (WAFs) with rules to detect and block suspicious file inclusion attempts can provide temporary protection. Restricting file permissions on the server to limit access to sensitive files can reduce the impact of exploitation. Monitoring web server logs for unusual requests targeting include/require parameters can help detect exploitation attempts early. It is also advisable to isolate WordPress instances in segmented network zones to limit lateral movement if compromised. Once a vendor patch is available, prompt application of updates is critical. Additionally, consider replacing the vulnerable theme with a secure alternative if timely patching is not feasible.