CVE-2026-94538 in WP File Download Plugin
Summary
by MITRE • 10/10/2026
The WP File Download plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 6.3.9. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to permanently delete any file managed by WP File Download, empty the entire trash, move files between categories, and publish or unpublish arbitrary files.
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Analysis
by VulDB Data Team • 10/10/2026
The vulnerability identified in the WP File Download plugin represents a critical authorization bypass flaw affecting all versions up through 6.3.9. This security defect stems from an insufficient verification of user permissions when processing administrative actions within the plugin's interface. Specifically, the application fails to enforce proper access control checks on endpoints responsible for managing file operations. As a result, any authenticated WordPress user with subscriber-level privileges or higher can manipulate these controls without possessing the necessary administrator rights. This misconfiguration allows lower-privileged users to execute high-impact administrative functions that should be strictly reserved for site administrators, fundamentally undermining the principle of least privilege inherent in secure system design.
From a technical perspective, this flaw is classified under CWE-284 Improper Access Control and aligns with MITRE ATT&CK technique T1078 Valid Accounts, as it involves an attacker leveraging legitimate but insufficiently privileged credentials to perform unauthorized actions. The core issue lies in the server-side logic that processes requests for file management tasks such as deletion, trashing, categorization, and publication status changes. Instead of validating whether the requesting user holds administrative privileges before executing these commands, the plugin relies on flawed or missing checks. This allows an attacker who has obtained valid login credentials to bypass standard role-based restrictions. The absence of robust server-side validation means that even if client-side controls are hidden from lower-privileged users via JavaScript or CSS, they can still interact directly with the underlying API endpoints using tools like curl or browser developer consoles, effectively circumventing UI-level protections.
The operational impact of this vulnerability is severe due to its potential for data loss and service disruption. An authenticated attacker with subscriber access can permanently delete any file managed by the plugin, leading to irreversible destruction of critical assets such as documents, media files, or software packages hosted on the WordPress site. Furthermore, the ability to empty the entire trash bin ensures that deleted items cannot be recovered through standard recovery mechanisms. Beyond data destruction, the capability to move files between categories and toggle their published status allows for significant content manipulation. This can result in unauthorized publication of sensitive materials, removal of public-facing resources causing denial of service for legitimate users, or reorganization of file structures that disrupts application logic dependent on specific directory paths or categorizations. Such actions compromise both the integrity and availability aspects of the CIA triad.
Mitigation strategies must prioritize immediate remediation through software updates and enhanced access control practices. The primary recommendation is to upgrade the WP File Download plugin to version 6.3.10 or later, where this authorization bypass has been addressed by developers implementing stricter permission checks on all administrative endpoints. In environments where updating is not immediately feasible, administrators should consider restricting user roles that require file management capabilities to only those with administrator privileges. Additionally, deploying a Web Application Firewall can help detect and block anomalous requests targeting these specific endpoints from non-admin users. Regular auditing of WordPress user permissions and reviewing plugin code for proper implementation of capability checks are essential long-term practices to prevent similar authorization flaws in future updates or other plugins within the ecosystem.