What is CVE-2019-4120?

CVE-2019-4120 is a medium-severity vulnerability in IBM Cloud Private, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-08-20.

How severe is CVE-2019-4120?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in IBM Cloud Private

CVE-2019-4120

IBM Cloud Private 3.1.1 and 3.1.2 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 158146.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-08-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.5% 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

IBM Cloud Private — versions 3.1.1, 3.1.2
IBM Cloud Private

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.ibm.com/support/docview.wss (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/158146 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2019-4120?: CVE-2019-4120 is a medium-severity vulnerability in IBM Cloud Private, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-08-20.
How severe is CVE-2019-4120?: Medium severity. CVSS v3 base score is 5.4 out of 10.