CVE-2024-3809 is a Local File Inclusion vulnerability classified under CWE-98, found in the Porto Theme - Functionality plugin for WordPress, versions up to and including 3.0.9. The vulnerability arises from improper control of filenames used in include or require statements within the plugin's code, specifically via the 'slideshow_type' post meta parameter. Authenticated attackers with contributor-level or higher permissions can manipulate this parameter to include arbitrary files from the server, leading to remote code execution if the included files contain PHP code. This flaw enables attackers to bypass WordPress access controls, execute arbitrary PHP code, and potentially access or modify sensitive data on the server. The vulnerability does not require user interaction beyond authentication, making it easier to exploit in environments where contributor access is granted. The CVSS v3.1 score of 8.8 reflects a high severity, with network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the widespread use of the Porto Theme in WordPress sites increases the potential attack surface. The vulnerability highlights the risks of insufficient input validation and improper handling of file inclusion mechanisms in web applications, especially in popular CMS plugins.

The impact of CVE-2024-3809 is significant for organizations running WordPress sites with the Porto Theme - Functionality plugin. Successful exploitation can lead to full remote code execution on the web server, allowing attackers to execute arbitrary PHP code, escalate privileges, and potentially take over the entire website or underlying server. This can result in data breaches, defacement, insertion of malicious backdoors, or pivoting to internal networks. Confidentiality is compromised as attackers may access sensitive files and data. Integrity is affected through unauthorized code execution and potential data manipulation. Availability may be disrupted if attackers deploy destructive payloads or ransomware. The requirement for contributor-level authentication limits exposure but does not eliminate risk, especially in environments with multiple users or weak access controls. The vulnerability poses a threat to e-commerce platforms, corporate websites, and any organization relying on WordPress for critical services, potentially leading to reputational damage, financial loss, and regulatory penalties.

1. Immediate upgrade: Update the Porto Theme - Functionality plugin to a patched version once released by the vendor. Monitor official channels for patch announcements. 2. Access control review: Restrict contributor-level permissions to trusted users only and audit existing user roles to minimize risk exposure. 3. Input validation: Implement web application firewall (WAF) rules to detect and block attempts to manipulate the 'slideshow_type' parameter with suspicious payloads. 4. Disable file uploads of PHP or executable files if not required, and enforce strict file type validation on uploads. 5. Employ principle of least privilege on the server and WordPress environment to limit the impact of potential code execution. 6. Monitor logs for unusual file inclusion attempts or unexpected PHP executions related to the plugin. 7. Consider isolating WordPress instances or running them with limited privileges to contain potential exploitation. 8. Regularly backup WordPress sites and databases to enable recovery in case of compromise. 9. Conduct security assessments and penetration testing focusing on plugin vulnerabilities and file inclusion vectors. 10. Educate site administrators about the risks of granting contributor-level access and the importance of timely patching.