What is CVE-2019-16333?

CVE-2019-16333 is a medium-severity vulnerability in Get-Simple Getsimple Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-09-15.

How severe is CVE-2019-16333?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Get-Simple Getsimple Cms

CVE-2019-16333

GetSimple CMS v3.3.15 has Persistent Cross-Site Scripting (XSS) in admin/theme-edit.php.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Get-Simple Getsimple Cms — versions 3.3.15

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/GetSimpleCMS/GetSimpleCMS/issues/1313 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-16333?: CVE-2019-16333 is a medium-severity vulnerability in Get-Simple Getsimple Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-09-15.
How severe is CVE-2019-16333?: Medium severity. CVSS v3 base score is 5.4 out of 10.