What is CVE-2018-16303?

CVE-2018-16303 is a high-severity vulnerability in Pdf-Xchange Editor, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2018-09-01.

How severe is CVE-2018-16303?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2018-16303 known to be exploited?

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

XXE in Pdf-Xchange Editor

CVE-2018-16303

PDF-XChange Editor through 7.0.326.1 allows remote attackers to cause a denial of service (resource consumption) via a crafted x:xmpmeta structure, a related issue to CVE-2003-1564.

Vulnerability class: XXE (XML External Entity)

Published 2018-09-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.2th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Pdf-Xchange Editor

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

Public proof-of-concept exploits

ponypot/cve

References

forum.tracker-software.com/viewtopic.php (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2018-16303?: CVE-2018-16303 is a high-severity vulnerability in Pdf-Xchange Editor, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2018-09-01.
How severe is CVE-2018-16303?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-16303 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.