CVE-2026-28089 is a Local File Inclusion (LFI) vulnerability found in the ThemeREX Daiquiri WordPress theme, specifically in versions up to 1.2.4. 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 include arbitrary files from the local server filesystem. By exploiting this vulnerability, an attacker can read sensitive files such as configuration files, password files, or other critical data stored on the server. In some cases, LFI can be leveraged to execute arbitrary code if combined with other vulnerabilities or if the attacker can upload malicious files. The vulnerability does not currently have a CVSS score and no public exploits have been reported, but the nature of LFI vulnerabilities generally makes them a significant risk. The issue affects the ThemeREX Daiquiri theme, a product used in WordPress environments, which are widely deployed globally. The vulnerability was published on March 5, 2026, and was reserved on February 25, 2026. No patches or fixes are linked yet, indicating that users should be cautious and monitor for updates. The vulnerability does not require authentication, increasing the risk of exploitation by remote attackers. The absence of user interaction requirements depends on the attack vector, but typically LFI can be exploited remotely if the vulnerable parameter is exposed. This vulnerability falls under the category of improper input validation and insecure file inclusion, which are common and critical issues in web application security.

The impact of CVE-2026-28089 on organizations worldwide can be significant. Successful exploitation allows attackers to read arbitrary files on the web server, potentially exposing sensitive information such as database credentials, configuration files, or user data. This can lead to further attacks, including privilege escalation, remote code execution, or full system compromise if combined with other vulnerabilities. For organizations relying on the affected ThemeREX Daiquiri theme, this vulnerability threatens the confidentiality and integrity of their systems and data. The availability impact is generally low unless the attacker uses the vulnerability to disrupt services. Given the widespread use of WordPress and the popularity of ThemeREX themes, many websites could be exposed, including corporate, governmental, and e-commerce sites. The ease of exploitation without authentication increases the risk of automated attacks and mass scanning by threat actors. The lack of known exploits in the wild currently limits immediate risk but does not diminish the potential severity. Organizations failing to address this vulnerability may face data breaches, reputational damage, and regulatory consequences depending on the data exposed.

To mitigate CVE-2026-28089, organizations should immediately check if they are using the ThemeREX Daiquiri theme version 1.2.4 or earlier and plan to upgrade to a patched version once available. Until a patch is released, consider disabling or restricting access to the vulnerable include/require functionality if possible through configuration or code review. Implement web application firewall (WAF) rules to detect and block attempts to exploit Local File Inclusion patterns, such as suspicious file path traversal sequences in URL parameters. Conduct thorough input validation and sanitization on all user-supplied inputs, especially those used in file inclusion functions. Limit file permissions on the server to prevent unauthorized reading of sensitive files. Monitor web server logs for unusual requests that may indicate exploitation attempts. Employ security plugins or tools that can detect and prevent LFI attacks in WordPress environments. Regularly back up website data and configurations to enable recovery in case of compromise. Finally, maintain an active vulnerability management program to promptly apply security updates and patches.