What is CVE-2021-31879?

CVE-2021-31879 is a medium-severity vulnerability in Broadcom Brocade Fabric Operating System Firmware, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-04-29.

How severe is CVE-2021-31879?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-31879 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Open Redirect in Broadcom Brocade Fabric Operating System Firmware

CVE-2021-31879

GNU Wget through 1.21.1 does not omit the Authorization header upon a redirect to a different origin, a related issue to CVE-2018-1000007.

Vulnerability class: Open Redirect

Published 2021-04-29 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.8th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

Public proof-of-concept exploits

References

mail.gnu.org/archive/html/bug-wget/2021-02/msg00002.html (Mailing List, Vendor Advisory)
security.netapp.com/advisory/ntap-20210618-0002/ (Third Party Advisory)

Frequently asked questions

What is CVE-2021-31879?: CVE-2021-31879 is a medium-severity vulnerability in Broadcom Brocade Fabric Operating System Firmware, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-04-29.
How severe is CVE-2021-31879?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-31879 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.