CVE-2026-5337 Frontend File Manager Plugin <= 23.6 - Subscriber+ Arbitrary Download Access via IDOR
Authenticated subscribers can access other users' files via IDOR in Frontend File Manager Plugin, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5337?
CVE-2026-5337 is a medium-severity missing authorization vulnerability in Unknown Frontend File Manager Plugin, published on 3 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-639
Which versions are affected by CVE-2026-5337?
How do I fix CVE-2026-5337?
No fix has been published for CVE-2026-5337 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-5337 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5337 exists.
Sources
Also known as GHSA-2gvx-55m9-gpjj.