# 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.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2026
- **Updated:** 4 May 2026
- **Also known as:** GHSA-2gvx-55m9-gpjj

## 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 (Authorization Bypass Through User-Controlled Key)

## 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.

## Is CVE-2026-5337 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5337 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5337 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5337 exists.

Affected product: Unknown Frontend File Manager Plugin. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-5337/ (Markdown: https://insights.sbomify.com/CVE-2026-5337/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5337
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5337
- OSV: https://osv.dev/vulnerability/CVE-2026-5337

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5337/
Summaries are generated and may contain mistakes; the official description above is the record.