How severe is CVE-2020-4276?

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

Is CVE-2020-4276 known to be exploited?

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

Vulnerability in IBM Websphere Application Server

CVE-2020-4276

IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 traditional is vulnerable to a privilege escalation vulnerability when using token-based authentication in an admin request over the SOAP connector. X-Force ID: 175984.

Published 2020-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

IBM Websphere Application Server — versions 7.0, 8.0, 8.5
IBM Websphere Application Server

Public proof-of-concept exploits

References

www.ibm.com/support/pages/node/6118222 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/175984 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4276?: CVE-2020-4276 is a high-severity vulnerability in IBM Websphere Application Server. CVSS score: 7.5/10. Published 2020-03-26.
How severe is CVE-2020-4276?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-4276 known to be exploited?: 9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.