CVE-2025-66104 in Offload, AI & Optimize with Cloudflare Images cf-images Plugin
Summary
by MITRE • 12/18/2025
Missing Authorization vulnerability in Anton Vanyukov Offload, AI & Optimize with Cloudflare Images cf-images allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Offload, AI & Optimize with Cloudflare Images: from n/a through <= 1.9.5.
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Analysis
by VulDB Data Team • 12/20/2025
The vulnerability identified as CVE-2025-66104 represents a critical missing authorization flaw within the Anton Vanyukov Offload, AI & Optimize plugin for WordPress, specifically when integrated with Cloudflare Images functionality. This security weakness manifests as an incorrectly configured access control security level that permits unauthorized users to exploit the system's protective mechanisms. The vulnerability impacts all versions of the plugin up to and including version 1.9.5, indicating a widespread exposure across multiple deployment scenarios. The issue stems from insufficient validation of user permissions and roles when processing requests related to Cloudflare image handling, creating a pathway for malicious actors to bypass intended security controls. This misconfiguration allows attackers to manipulate image processing workflows and potentially access restricted functionality without proper authentication.
The technical implementation of this vulnerability resides in the plugin's handling of API endpoints and image processing requests that interface with Cloudflare's infrastructure. When users interact with the offload functionality, the system should verify that appropriate authorization levels are maintained before executing image optimization or processing tasks. However, the current implementation fails to enforce proper access controls, allowing any authenticated user to perform operations that should be restricted to administrators or specific user roles. This flaw operates at the application layer and directly violates fundamental security principles of least privilege and proper access control enforcement. The vulnerability can be classified under CWE-284, which specifically addresses improper access control, and aligns with ATT&CK technique T1078 for valid accounts and privilege escalation through unauthorized access to system resources.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to manipulate the image processing pipeline and potentially gain insights into the system's configuration and data handling practices. An attacker could leverage this weakness to perform unauthorized image transformations, access cached or processed images that should remain restricted, and potentially disrupt the normal operation of the Cloudflare integration. The exposure creates opportunities for data leakage through image metadata manipulation, and could enable more sophisticated attacks that exploit the image processing workflows for further system compromise. Organizations using this plugin version range face significant risk of unauthorized modification of their image assets, which could impact both security and business operations. The vulnerability particularly affects WordPress environments where content management and media handling are critical components of the overall security posture.
Mitigation strategies for this vulnerability should prioritize immediate plugin updates to versions that address the authorization flaw, as the vendor has likely released patches to resolve the issue. Administrators should conduct thorough access control reviews to ensure that only authorized personnel maintain the ability to perform image processing operations within the WordPress environment. Network-level monitoring should be implemented to detect unusual patterns in image processing requests that could indicate exploitation attempts. Security teams should also consider implementing additional authentication layers for critical image handling operations and regularly audit user permissions within the WordPress system. The remediation process should include comprehensive testing to ensure that access controls are properly enforced without disrupting legitimate functionality. Organizations should also review their Cloudflare integration settings to confirm that appropriate security measures are in place to prevent unauthorized access to their image assets. This vulnerability underscores the importance of maintaining current security practices and regularly reviewing plugin configurations to prevent unauthorized access to system resources.