What is CVE-2020-4783?

CVE-2020-4783 is a medium-severity vulnerability in IBM Spectrum Protect Plus, classified under Missing Authorization. CVSS score: 5.9/10. Published 2020-11-23.

How severe is CVE-2020-4783?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in IBM Spectrum Protect Plus

CVE-2020-4783

IBM Spectrum Protect Plus 10.1.0 through 10.1.6 could allow a remote attacker to obtain sensitive information, caused by the failure to properly enable HTTP Strict Transport Security. An attacker could exploit this vulnerability to obtain sensitive information using man in the middle techniques. IBM X-Force ID: 189214.

Vulnerability class: Broken Access Control

Published 2020-11-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.2th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

IBM Spectrum Protect Plus — versions 10.1.0, 10.1.6
IBM Spectrum Protect Plus
Linux Kernel

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

www.ibm.com/support/pages/node/6368601 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/189214 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4783?: CVE-2020-4783 is a medium-severity vulnerability in IBM Spectrum Protect Plus, classified under Missing Authorization. CVSS score: 5.9/10. Published 2020-11-23.
How severe is CVE-2020-4783?: Medium severity. CVSS v3 base score is 5.9 out of 10.