CVE-2018-6383 File upload in n/a

High 8.8 Published 29 Jan 2018 Updated 5 Aug 2024

Authenticated admins or editors can execute arbitrary PHP code by uploading files with .pht or .phar extensions due to an incomplete forbidden types list.

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-2018-6383?

CVE-2018-6383 is a high-severity vulnerability in n/a, published on 29 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Monstra CMS through 3.0.4 has an incomplete "forbidden types" list that excludes .php (and similar) file extensions but not the .pht or .phar extension, which allows remote authenticated Admins or Editors to execute arbitrary PHP code by uploading a file, a different vulnerability than CVE-2017-18048.

Weakness: CWE-184

Which versions are affected by CVE-2018-6383?

It affects 1 product.

Products include Monstra Monstra.

How do I fix CVE-2018-6383?

No fix has been published for CVE-2018-6383 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-6383 being exploited?

There is no known exploitation of CVE-2018-6383 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as GHSA-4cjq-7wr8-ccw5.