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CVE-2018-6383

HighPublished

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,...

Published: Jan 29, 2018
Updated: Aug 5, 2024
Assigning CNA: mitre
Evidence observed: Jun 4, 2021

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

13.5%

Moderate · next 30 days

Percentile: 96.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

ExploitsExploit
The whole collection of Exploits developed by me (Hacker5preme)
Monstra CMS 3.0.4 - Remote Code Execution (Authenticated)Exploit
Ron Jost · php · Jun 4, 2021

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