CVE-2021-4356 Frontend File Manager <= 18.2 - Unauthenticated Arbitrary File Download

What is CVE-2021-4356?

CVE-2021-4356 is a critical missing authorization vulnerability in nmedia Frontend File Manager Plugin, published on 7 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Download in versions up to, and including, 18.2. This is due to lacking authentication protections, capability checks, and sanitization, all on the wpfm_file_meta_update AJAX action. This makes it possible for unauthenticated attackers to download arbitrary files on the site, potentially leading to site takeover.

Weakness: CWE-862

Which versions are affected by CVE-2021-4356?

It affects 1 product.

Products include Najeebmedia Frontend File Manager Plugin.

How do I fix CVE-2021-4356?

No fix has been published for CVE-2021-4356 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-2021-4356 being exploited?

There is no known exploitation of CVE-2021-4356 in the wild and no public exploit code.

Other vulnerabilities in nmedia Frontend File Manager Plugin

• CVE-2021-4368 Frontend File Manager <= 18.2 - Authenticated Settings Change leading to Arbitrary File Upload Critical 9.9
• CVE-2021-4350 Frontend File Manager <= 18.2 - Unauthenticated HTML Injection leading to Spam Emails High 7.2
• CVE-2021-4365 Frontend File Manager <= 18.2 - Unauthenticated Stored Cross-Site Scripting High 7.2
• CVE-2023-5105 Frontend File Manager < 22.6 - Editor+ Arbitrary File Download Medium 6.5
• CVE-2021-4359 Frontend File Manager Plugin <= 18.2 - Unauthenticated Arbitrary Post Deletion Medium 6.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-538r-g5r4-2c2w.