CVE-2026-5337: CWE-639 Authorization Bypass Through User-Controlled Key in Frontend File Manager Plugin
During the analysis, it was identified that authenticated attackers with Subscriber-level access or higher are able to perform an Insecure Direct Object Reference (IDOR) attack. This vulnerability exists because the Frontend File Manager Plugin WordPress plugin through 23.6 does not properly validate user authorization for the requested uploaded file when processing download requests. By modifying the value of the 'file_id' parameter in the download endpoint (e.g., http://localhost/?do=wpfm_download&file_id=40&nm_file_nonce=a36fb893f1), an attacker can access files belonging to other users, including privileged users such as administrators. This allows unauthorized access/read to sensitive data stored within the application.
AI Analysis
Technical Summary
This vulnerability arises because the Frontend File Manager Plugin does not properly validate user authorization when processing file download requests. Specifically, attackers with at least Subscriber-level access can modify the 'file_id' parameter in the download endpoint to access files uploaded by other users, bypassing intended access controls. This constitutes an IDOR vulnerability categorized under CWE-639. The issue affects versions through 23.6 of the plugin. No CVSS score or official remediation details have been published yet.
Potential Impact
Exploitation of this vulnerability allows unauthorized users to read files uploaded by other users, including those uploaded by privileged users such as administrators. This can lead to exposure of sensitive data stored within the application. The impact is limited to authenticated users with Subscriber-level or higher access but can result in significant confidentiality breaches.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Subscriber-level access where possible and monitor for suspicious activity related to file downloads. Avoid granting unnecessary file access permissions to low-privilege users.
CVE-2026-5337: CWE-639 Authorization Bypass Through User-Controlled Key in Frontend File Manager Plugin
Description
During the analysis, it was identified that authenticated attackers with Subscriber-level access or higher are able to perform an Insecure Direct Object Reference (IDOR) attack. This vulnerability exists because the Frontend File Manager Plugin WordPress plugin through 23.6 does not properly validate user authorization for the requested uploaded file when processing download requests. By modifying the value of the 'file_id' parameter in the download endpoint (e.g., http://localhost/?do=wpfm_download&file_id=40&nm_file_nonce=a36fb893f1), an attacker can access files belonging to other users, including privileged users such as administrators. This allows unauthorized access/read to sensitive data stored within the application.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises because the Frontend File Manager Plugin does not properly validate user authorization when processing file download requests. Specifically, attackers with at least Subscriber-level access can modify the 'file_id' parameter in the download endpoint to access files uploaded by other users, bypassing intended access controls. This constitutes an IDOR vulnerability categorized under CWE-639. The issue affects versions through 23.6 of the plugin. No CVSS score or official remediation details have been published yet.
Potential Impact
Exploitation of this vulnerability allows unauthorized users to read files uploaded by other users, including those uploaded by privileged users such as administrators. This can lead to exposure of sensitive data stored within the application. The impact is limited to authenticated users with Subscriber-level or higher access but can result in significant confidentiality breaches.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Subscriber-level access where possible and monitor for suspicious activity related to file downloads. Avoid granting unnecessary file access permissions to low-privilege users.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-04-01T14:05:29.660Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f6eceacbff5d8610c1b6db
Added to database: 5/3/2026, 6:36:26 AM
Last enriched: 5/3/2026, 6:51:22 AM
Last updated: 5/5/2026, 8:03:42 AM
Views: 25
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