CVE-2025-11499 is a critical security vulnerability affecting the Tablesome Table – Contact Form DB – WPForms, CF7, Gravity, Forminator, Fluent plugin for WordPress, present in all versions up to and including 1.1.32. The root cause is the lack of proper file type validation in the set_featured_image_from_external_url() function, which handles setting featured images from external URLs. This flaw allows unauthenticated attackers to upload arbitrary files to the server hosting the WordPress site. Since no authentication or user interaction is required, the attack surface is broad. If the WordPress site configuration permits unauthenticated users to add featured images and triggers workflows based on these actions, an attacker can exploit this to upload malicious files, potentially leading to remote code execution (RCE). The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type), which is a common vector for web server compromise. The CVSS v3.1 base score of 9.8 reflects the critical nature of this vulnerability, with an attack vector over the network, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Although no known exploits have been reported in the wild yet, the ease of exploitation and potential impact make this a significant threat. The vulnerability affects a widely used WordPress plugin that integrates with popular form plugins such as WPForms, Contact Form 7 (CF7), Gravity Forms, Forminator, and Fluent Forms, increasing the scope of affected sites. The lack of a patch at the time of reporting necessitates immediate attention to mitigate risk.

The impact of CVE-2025-11499 is severe for organizations running WordPress sites with the affected plugin versions. Successful exploitation allows attackers to upload arbitrary files, which can include web shells or other malicious payloads, leading to remote code execution. This can result in full compromise of the web server, data theft, defacement, or use of the server as a pivot point for further attacks within the network. The vulnerability threatens confidentiality by exposing sensitive data, integrity by allowing unauthorized code execution and modification, and availability by potentially disrupting services. Since no authentication or user interaction is required, attackers can exploit this remotely and anonymously, increasing the risk of widespread attacks. Organizations relying on the affected plugin for form data management and contact form databases face operational risks, reputational damage, and compliance issues if exploited. The broad integration with multiple popular form plugins further amplifies the potential attack surface and impact.

1. Immediately restrict or disable the ability for unauthenticated users to add or modify featured images on WordPress sites using the affected plugin. 2. Implement strict web application firewall (WAF) rules to detect and block suspicious file upload attempts targeting the set_featured_image_from_external_url() function or related endpoints. 3. Monitor server file systems and web directories for unexpected or suspicious files, especially those with executable extensions or unusual metadata. 4. Apply principle of least privilege to WordPress user roles and permissions, ensuring that only trusted users can upload or modify images or files. 5. Regularly audit and update all WordPress plugins and themes, and subscribe to vendor security advisories for timely patch releases. 6. If possible, isolate the WordPress environment using containerization or sandboxing to limit the impact of any potential compromise. 7. Employ intrusion detection systems (IDS) to monitor for anomalous behavior indicative of exploitation attempts. 8. Prepare incident response plans specifically addressing web shell detection and removal. 9. Consider temporarily disabling the affected plugin until a security patch is released. 10. Educate site administrators about the risks of arbitrary file upload vulnerabilities and encourage proactive security hygiene.