What is CVE-2020-4253?

CVE-2020-4253 is a high-severity vulnerability in IBM Content Navigator, classified under Insufficient Session Expiration. CVSS score: 8.8/10. Published 2020-03-24.

How severe is CVE-2020-4253?

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

Vulnerability in IBM Content Navigator

CVE-2020-4253

IBM Content Navigator 3.0CD does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 175559.

Published 2020-03-24 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.009 (58.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.2% 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 Content Navigator — versions 3.0CD
IBM Content Navigator — versions 3.0.0

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

www.ibm.com/support/pages/node/6116020 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/175559 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4253?: CVE-2020-4253 is a high-severity vulnerability in IBM Content Navigator, classified under Insufficient Session Expiration. CVSS score: 8.8/10. Published 2020-03-24.
How severe is CVE-2020-4253?: High severity. CVSS v3 base score is 8.8 out of 10.