What is CVE-2021-39063?

CVE-2021-39063 is a critical-severity vulnerability in IBM Spectrum Protect Plus, classified under Origin Validation Error. CVSS score: 9.1/10. Published 2021-12-13.

How severe is CVE-2021-39063?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in IBM Spectrum Protect Plus

CVE-2021-39063

IBM Spectrum Protect Plus 10.1.0.0 through 10.1.8.x uses Cross-Origin Resource Sharing (CORS) which could allow an attacker to carry out privileged actions and retrieve sensitive information due to a misconfiguration in access control headers. IBM X-Force ID: 214956.

Published 2021-12-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.5th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

IBM Spectrum Protect Plus — versions 10.1.0.0, 10.1.8.0
IBM Spectrum Protect Plus
Linux Kernel

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

www.ibm.com/support/pages/node/6525346 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/214956 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-39063?: CVE-2021-39063 is a critical-severity vulnerability in IBM Spectrum Protect Plus, classified under Origin Validation Error. CVSS score: 9.1/10. Published 2021-12-13.
How severe is CVE-2021-39063?: Critical severity. CVSS v3 base score is 9.1 out of 10.