CVE-2025-6206 is a high-severity vulnerability affecting the WordPress plugin 'Aiomatic - Automatic AI Content Writer & Editor, GPT-3 & GPT-4, ChatGPT ChatBot & AI Toolkit' developed by CodeRevolution. The vulnerability stems from improper validation of file types in the 'aiomatic_image_editor_ajax_submit' function, allowing authenticated users with Subscriber-level privileges or higher to upload arbitrary files to the server. This lack of file type restriction corresponds to CWE-434 (Unrestricted Upload of File with Dangerous Type). Exploitation requires that the attacker provides any value for the Stability.AI API key, which can be arbitrary, thus lowering the barrier to exploitation. Once an attacker uploads a malicious file, such as a web shell or other executable script, they could achieve remote code execution (RCE) on the affected WordPress site, compromising confidentiality, integrity, and availability of the server and its data. The vulnerability affects all versions up to and including 2.5.0 of the plugin. The CVSS v3.1 base score is 7.5, reflecting network attack vector, high impact on confidentiality, integrity, and availability, low privileges required, but high attack complexity and no user interaction needed. No known exploits are currently reported in the wild, and no official patches have been published yet. The vulnerability is particularly critical because WordPress is widely used across many organizations, and this plugin integrates advanced AI content generation tools, making it attractive for attackers targeting content management systems. The vulnerability's exploitation path requires authentication but only at a low privilege level, which is common for many WordPress sites where subscriber accounts may be created or compromised. The arbitrary file upload capability can be leveraged for persistent backdoors, data exfiltration, or site defacement.

For European organizations, this vulnerability poses a significant risk, especially for those relying on WordPress sites with the Aiomatic plugin installed. Successful exploitation could lead to full server compromise, enabling attackers to steal sensitive data, manipulate website content, or disrupt services. This is particularly concerning for sectors such as media, e-commerce, education, and government agencies that use WordPress for public-facing websites or internal portals. The ability to upload arbitrary files and achieve remote code execution could facilitate ransomware deployment or lateral movement within the network. Given the plugin's focus on AI content generation, organizations leveraging AI-driven content workflows may face operational disruptions and reputational damage. Additionally, the requirement for only subscriber-level access means that even low-privilege users or compromised accounts could be leveraged to exploit the vulnerability, increasing the attack surface. The absence of patches and known exploits in the wild suggests a window of opportunity for attackers to develop exploits, emphasizing the need for proactive mitigation. Compliance with GDPR and other European data protection regulations could be impacted if data breaches occur due to this vulnerability, leading to legal and financial consequences.

1. Immediate mitigation should include disabling or uninstalling the Aiomatic plugin until a security patch is released by the vendor. 2. Restrict user registration and review subscriber-level accounts to ensure no unauthorized users exist. 3. Implement strict file upload controls at the web server or application firewall level to block uploads of executable or script files, regardless of plugin controls. 4. Monitor web server logs for suspicious file upload attempts or unusual activity related to the 'aiomatic_image_editor_ajax_submit' endpoint. 5. Employ web application firewalls (WAF) with custom rules to detect and block attempts to exploit this vulnerability. 6. Enforce the principle of least privilege on WordPress user roles, minimizing the number of users with subscriber or higher access. 7. Regularly back up WordPress sites and databases to enable rapid recovery in case of compromise. 8. Once available, promptly apply vendor patches or updates addressing this vulnerability. 9. Conduct security awareness training for administrators and users about the risks of arbitrary file uploads and suspicious activities. 10. Consider isolating WordPress installations in segmented network zones to limit potential lateral movement if compromised.