What is CVE-2020-4719?

CVE-2020-4719 is a medium-severity vulnerability in IBM Cloud Apm, classified under Use of Incorrectly-Resolved Name or Reference. CVSS score: 4.9/10. Published 2021-03-02.

How severe is CVE-2020-4719?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in IBM Cloud Apm

CVE-2020-4719

The IBM Cloud APM 8.1.4 server will issue a DNS request to resolve any hostname specified in the Cloud Event Management Webhook URL configuration definition. This could enable an authenticated user with admin authorization to create DNS query strings that are not hostnames. IBM X-Force ID: 187861.

Published 2021-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.001

Affected products

IBM Cloud Apm — versions 8.1.4
IBM Cloud Application Performance Management — versions 8.1.4

Weakness classification (CWE)

CWE-706 — Use of Incorrectly-Resolved Name or Reference

References

www.ibm.com/support/pages/node/6417137 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/187861 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4719?: CVE-2020-4719 is a medium-severity vulnerability in IBM Cloud Apm, classified under Use of Incorrectly-Resolved Name or Reference. CVSS score: 4.9/10. Published 2021-03-02.
How severe is CVE-2020-4719?: Medium severity. CVSS v3 base score is 4.9 out of 10.