What is CVE-2020-27377?

CVE-2020-27377 is a medium-severity vulnerability in Cmsmadesimple Cms Made Simple, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-06-01.

How severe is CVE-2020-27377?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Cmsmadesimple Cms Made Simple

CVE-2020-27377

A cross-site scripting (XSS) vulnerability was discovered in the Administrator panel on the 'Setting News' module on CMS Made Simple 2.2.14 which allows an attacker to execute arbitrary web scripts.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-06-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (42.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Cmsmadesimple Cms Made Simple — versions 2.2.14

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

dev.cmsmadesimple.org/bug/view/12317 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2020-27377?: CVE-2020-27377 is a medium-severity vulnerability in Cmsmadesimple Cms Made Simple, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-06-01.
How severe is CVE-2020-27377?: Medium severity. CVSS v3 base score is 4.8 out of 10.