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CVE-2018-17418

HighPublished

Monstra CMS 3.0.4 allows remote attackers to execute arbitrary PHP code via a mixed-case file extension, as demonstrated by the 123.PhP filename, because...

Published: Mar 7, 2019
Updated: Aug 5, 2024
Assigning CNA: mitre
Evidence observed: Aug 5, 2026

Primary CVSS

7.2/ 10High

nvd · CVSS 3.0

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

2.5%

Low · next 30 days

Percentile: 83.8%
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 3.0.4 allows remote attackers to execute arbitrary PHP code via a mixed-case file extension, as demonstrated by the 123.PhP filename, because plugins\box\filesmanager\filesmanager.admin.php mishandles the forbidden_types variable.

Sources

monstra_cms-3.0.4--getshellExploit
monstra_cms-3.0.4-上传getshell CVE-2018-17418

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