What is CVE-2021-20431?

CVE-2021-20431 is a medium-severity vulnerability in IBM I2 Analysts Notebook, classified under Insufficient Session Expiration. CVSS score: 6.5/10. Published 2021-07-26.

How severe is CVE-2021-20431?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in IBM I2 Analysts Notebook

CVE-2021-20431

IBM i2 Analyst's Notebook Premium 9.2.0, 9.2.1, and 9.2.2 does not invalidate session after logout which could allow an an attacker to obtain sensitive information from the system. IBM X-Force ID: 196342.

Published 2021-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

IBM I2 Analysts Notebook — versions 9.2.0, 9.2.1, 9.2.2
IBM I2 Analyst's Notebook Premium — versions 9.2.0, 9.2.1, 9.2.2
Linux Kernel
Microsoft Windows

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

www.ibm.com/support/pages/node/6474865 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/196342 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20431?: CVE-2021-20431 is a medium-severity vulnerability in IBM I2 Analysts Notebook, classified under Insufficient Session Expiration. CVSS score: 6.5/10. Published 2021-07-26.
How severe is CVE-2021-20431?: Medium severity. CVSS v3 base score is 6.5 out of 10.