What is CVE-2018-19903?

CVE-2018-19903 is a medium-severity vulnerability in Xsltcms.org Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-12-31.

How severe is CVE-2018-19903?

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

Is CVE-2018-19903 known to be exploited?

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

XSS in Xsltcms.org Project

CVE-2018-19903

Persistent XSS exists in XSLT CMS via the create/?action=items.edit&type=Page title field.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-12-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.7% 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

Xsltcms.org Project

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

0xT11/CVE-POC

References

github.com/security-breachlock/CVE-2018-19903/blob/master/XSS1.pdf (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-19903?: CVE-2018-19903 is a medium-severity vulnerability in Xsltcms.org Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-12-31.
How severe is CVE-2018-19903?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2018-19903 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.