What is CVE-2021-20405?

CVE-2021-20405 is a high-severity vulnerability in IBM Security Verify Information Queue, classified under Improper Encoding or Escaping of Output. CVSS score: 7.5/10. Published 2021-02-11.

How severe is CVE-2021-20405?

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

Vulnerability in IBM Security Verify Information Queue

CVE-2021-20405

IBM Security Verify Information Queue 1.0.6 and 1.0.7 could allow a user to perform unauthorized activities due to improper encoding of output. IBM X-Force ID: 196183.

Published 2021-02-11 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.008 (54.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% 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: 0.008 · change: +0.000

Affected products

IBM Security Verify Information Queue — versions 1.0.6, 1.0.7
IBM Security Verify Information Queue — versions 1.0.6, 1.0.7

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

www.ibm.com/support/pages/node/6414367 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/196183 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20405?: CVE-2021-20405 is a high-severity vulnerability in IBM Security Verify Information Queue, classified under Improper Encoding or Escaping of Output. CVSS score: 7.5/10. Published 2021-02-11.
How severe is CVE-2021-20405?: High severity. CVSS v3 base score is 7.5 out of 10.