CVE-2018-6383

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-01-29 · updated 2026-06-17
Weakness: CWE-184

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.

Affected products

Monstra: through 3.0.4

References

http://packetstormsecurity.com/files/162968/Monstra-CMS-3.0.4-Remote-Code-Execution.html
https://github.com/Hacker5preme/Exploits/tree/main/CVE-2018-6383-Exploit
https://github.com/monstra-cms/monstra/issues/429
http://packetstormsecurity.com/files/162968/Monstra-CMS-3.0.4-Remote-Code-Execution.html
https://github.com/Hacker5preme/Exploits/tree/main/CVE-2018-6383-Exploit
https://github.com/monstra-cms/monstra/issues/429

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