What is CVE-2020-20138?

CVE-2020-20138 is a medium-severity vulnerability in Cmsmadesimple Cms Made Simple, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-12-17.

How severe is CVE-2020-20138?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Cmsmadesimple Cms Made Simple

CVE-2020-20138

Cross Site Scripting (XSS) vulnerability in the Showtime2 Slideshow module in CMS Made Simple (CMSMS) 2.2.4.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.029 (86.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: +0.000

Affected products

Cmsmadesimple Cms Made Simple — versions 2.2.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

packetstormsecurity.com/files/160604/Flexmonster-Pivot-Table-And-Charts-2.7.17-… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2020-20138?: CVE-2020-20138 is a medium-severity vulnerability in Cmsmadesimple Cms Made Simple, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-12-17.
How severe is CVE-2020-20138?: Medium severity. CVSS v3 base score is 6.1 out of 10.