What is CVE-2020-20691?

CVE-2020-20691 is a medium-severity vulnerability in Monstra Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2021-09-27.

How severe is CVE-2020-20691?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2020-20691 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Monstra Cms

CVE-2020-20691

An issue in Monstra CMS v3.0.4 allows attackers to execute arbitrary web scripts or HTML via bypassing the file extension filter and uploading crafted HTML files.

Vulnerability class: Unrestricted File Upload

EPSS: 0.009 (56.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Monstra Monstra_cms — versions 3.0.4
N/a — versions n/a

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2020-20691?: CVE-2020-20691 is a medium-severity vulnerability in Monstra Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2021-09-27.
How severe is CVE-2020-20691?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2020-20691 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.