CVE-2025-13374 is a critical security vulnerability identified in the Kalrav AI Agent plugin for WordPress, developed by irisideatechsolutions. The vulnerability stems from the plugin's failure to validate file types in the kalrav_upload_file AJAX action, allowing unauthenticated attackers to upload arbitrary files to the server. This unrestricted file upload (classified under CWE-434) can be exploited remotely without any authentication or user interaction, making it highly accessible to attackers. Uploaded malicious files could enable remote code execution (RCE), compromising the server's confidentiality, integrity, and availability. The vulnerability affects all plugin versions up to and including 2.3.3. The CVSS v3.1 score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) indicates a critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and full impact on system security properties. Although no exploits have been reported in the wild yet, the potential for severe damage is high. The lack of patch links suggests that a fix may not yet be available, emphasizing the need for immediate defensive actions. The vulnerability is particularly concerning for WordPress sites using this plugin, as attackers could gain full control over the web server, potentially leading to data breaches, site defacement, or use of the server for further attacks.

For European organizations, this vulnerability poses a significant threat, especially those relying on WordPress websites with the Kalrav AI Agent plugin installed. Successful exploitation can lead to complete server compromise, exposing sensitive data, disrupting services, and damaging organizational reputation. The ability to execute arbitrary code remotely without authentication increases the risk of widespread attacks, including ransomware deployment, data exfiltration, or pivoting within internal networks. Given the widespread use of WordPress across Europe, sectors such as e-commerce, government, healthcare, and finance could be targeted. The impact is exacerbated in countries with high WordPress market penetration and where cybercriminal activity is prevalent. Additionally, organizations with limited cybersecurity resources or delayed patch management processes face higher risks. The vulnerability could also be leveraged in supply chain attacks if exploited on third-party service providers hosting WordPress sites for multiple clients.

Immediate mitigation steps include disabling or restricting the kalrav_upload_file AJAX action if possible, to prevent file uploads until a patch is available. Implement strict server-side file type validation and filtering to block dangerous file extensions and MIME types. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious upload attempts targeting this vulnerability. Regularly monitor web server logs and WordPress activity for unusual file uploads or execution patterns. Limit file upload permissions to the minimum necessary and isolate upload directories with restrictive permissions to prevent execution of uploaded files. Maintain up-to-date backups of affected sites to enable rapid recovery. Engage with the plugin vendor or community to track patch releases and apply updates promptly once available. Additionally, conduct security audits of WordPress installations to identify and remediate similar vulnerabilities. Educate site administrators on secure plugin management and the risks of using outdated or untrusted plugins.