CVE-2018-6383

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.

• CWE-184

• http://packetstormsecurity.com/files/162968/Monstra-CMS-3.0.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
• https://github.com/Hacker5preme/Exploits/tree/main/CVE-2018-6383-ExploitExploit, Third Party Advisory
• https://github.com/monstra-cms/monstra/issues/429Exploit, Issue Tracking, Third Party Advisory
• http://packetstormsecurity.com/files/162968/Monstra-CMS-3.0.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
• https://github.com/Hacker5preme/Exploits/tree/main/CVE-2018-6383-ExploitExploit, Third Party Advisory
• https://github.com/monstra-cms/monstra/issues/429Exploit, Issue Tracking, Third Party Advisory

Published

Jan 29, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2018-6377In Joomla! before 3.8.4, inadequate input filtering in com_f…
• CVE-2018-6378In Joomla! Core before 3.8.8, inadequate filtering of file a…
• CVE-2018-6379In Joomla! before 3.8.4, inadequate input filtering in the U…
• CVE-2018-6380In Joomla! before 3.8.4, lack of escaping in the module chro…
• CVE-2018-6381In ZZIPlib 0.13.67, 0.13.66, 0.13.65, 0.13.64, 0.13.63, 0.13…
• CVE-2018-6382MantisBT 2.10.0 allows local users to conduct SQL Injection …
• CVE-2018-6384Unquoted Windows search path vulnerability in NSClient++ bef…
• CVE-2018-6387iBall iB-WRA150N 1.2.6 build 110401 Rel.47776n devices have …
• CVE-2018-6388iBall iB-WRA150N 1.2.6 build 110401 Rel.47776n devices allow…
• CVE-2018-6389In WordPress through 4.9.2, unauthenticated attackers can ca…
• CVE-2018-6390The WStr::assign function in kso.dll in Kingsoft WPS Office …6.5
• CVE-2018-6391A cross-site request forgery web vulnerability has been disc…