What is CVE-2018-19507?

CVE-2018-19507 is a medium-severity vulnerability in Cmsimple, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-12-19.

How severe is CVE-2018-19507?

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

Is CVE-2018-19507 known to be exploited?

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

XSS in Cmsimple

CVE-2018-19507

CMSimple 4.7.5 has XSS via an admin's use of a ?file=config&action=array URI.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-12-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Cmsimple — versions 4.7.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

0xT11/CVE-POC

References

github.com/security-breachlock/CVE-2018-19507/blob/master/Persistent-XSS.pdf (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-19507?: CVE-2018-19507 is a medium-severity vulnerability in Cmsimple, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-12-19.
How severe is CVE-2018-19507?: Medium severity. CVSS v3 base score is 4.8 out of 10.
Is CVE-2018-19507 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.