What is CVE-2020-4983?

CVE-2020-4983 is a high-severity vulnerability in IBM Spectrum Lsf, classified under Improper Authentication. CVSS score: 7.8/10. Published 2021-01-20.

How severe is CVE-2020-4983?

High severity. CVSS v3 base score is 7.8 out of 10.

Auth bypass in IBM Spectrum Lsf

CVE-2020-4983

IBM Spectrum LSF 10.1 and IBM Spectrum LSF Suite 10.2 could allow a user on the local network who has privileges to submit LSF jobs to execute arbitrary commands. IBM X-Force ID: 192586.

Vulnerability class: Broken Authentication

Published 2021-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

IBM Spectrum Lsf — versions 10.1
IBM Spectrum Lsf — versions 10.1
IBM Spectrum Lsf Suite — versions 10.2
IBM Spectrum Lsf Suite — versions 10.2

Weakness classification (CWE)

References

www.ibm.com/support/pages/node/6395478 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/192586 (VDB Entry, vdb-entry, Vendor Advisory)
www.hpcsec.com/2021/01/14/cve-2020-4983/ (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-4983?: CVE-2020-4983 is a high-severity vulnerability in IBM Spectrum Lsf, classified under Improper Authentication. CVSS score: 7.8/10. Published 2021-01-20.
How severe is CVE-2020-4983?: High severity. CVSS v3 base score is 7.8 out of 10.