What is CVE-2021-20434?

CVE-2021-20434 is a medium-severity vulnerability in IBM Security Verify Bridge, classified under Insufficiently Protected Credentials. CVSS score: 4.4/10. Published 2021-09-23.

How severe is CVE-2021-20434?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in IBM Security Verify Bridge

CVE-2021-20434

IBM Security Verify Bridge 1.0.5.0 stores user credentials in plain clear text which can be read by a local user. IBM X-Force ID: 196346.

Published 2021-09-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

IBM Security Verify Bridge — versions 1.0.5.0
IBM Security Verify Bridge

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

www.ibm.com/support/pages/node/6491651 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/196346 (Patch, VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20434?: CVE-2021-20434 is a medium-severity vulnerability in IBM Security Verify Bridge, classified under Insufficiently Protected Credentials. CVSS score: 4.4/10. Published 2021-09-23.
How severe is CVE-2021-20434?: Medium severity. CVSS v3 base score is 4.4 out of 10.