What is CVE-2020-4938?

CVE-2020-4938 is a high-severity vulnerability in IBM Mq Appliance, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-07-12.

How severe is CVE-2020-4938?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in IBM Mq Appliance

CVE-2020-4938

IBM MQ Appliance 9.1 and 9.2 is vulnerable to cross-site request forgery which could allow an attacker to execute malicious and unauthorized actions transmitted from a user that the website trusts. IBM X-Force ID: 191815.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-07-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.4th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

IBM Mq Appliance — versions 9.1, 9.2
IBM Mq Appliance

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

www.ibm.com/support/pages/node/6466717 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/191815 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4938?: CVE-2020-4938 is a high-severity vulnerability in IBM Mq Appliance, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-07-12.
How severe is CVE-2020-4938?: High severity. CVSS v3 base score is 8.8 out of 10.