What is CVE-2019-20627?

CVE-2019-20627 is a critical-severity vulnerability in Rbsoft Autoupdater.net, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-03-23.

How severe is CVE-2019-20627?

Critical severity. CVSS v3 base score is 9.8 out of 10.

XXE in Rbsoft Autoupdater.net

CVE-2019-20627

AutoUpdater.cs in AutoUpdater.NET before 1.5.8 allows XXE.

Vulnerability class: XXE (XML External Entity)

Published 2020-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (83.0th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Rbsoft Autoupdater.net

Weakness classification (CWE)

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

References

github.com/ravibpatel/AutoUpdater.NET/commit/1dc25f2bea6ea522dbac1512b5563c4746… (Patch, Third Party Advisory)
github.com/ravibpatel/AutoUpdater.NET/releases/tag/v1.5.8 (Third Party Advisory)
www.doyler.net/security-not-included/autoupdater-net-vulnerability (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-20627?: CVE-2019-20627 is a critical-severity vulnerability in Rbsoft Autoupdater.net, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-03-23.
How severe is CVE-2019-20627?: Critical severity. CVSS v3 base score is 9.8 out of 10.