admin/index.php in Monstra CMS 3.0.4 allows arbitrary directory listing via id=filesmanager&path=uploads/.......//./.......//./ requests.

published 2018-09-18 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8618

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

Exploit prediction

1.97% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

blog.51cto.com http://blog.51cto.com/13770310/2173957 referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/monstra-cms/monstra/issues/457 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

blog.51cto.com /13770310/2173957
exploit, third-party-advisory
github.com /monstra-cms/monstra/issues/457
exploit, issue-tracking, third-party-advisory

Sources

CVE List CVE-2018-16820
NVD CVE-2018-16820

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary