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Fencer Vulns
medium 6.1

CVE-2021-31879 json

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.

published 2021-04-29 5 y ago modified 2026-10-08 31 d ago also EUVD-2021-18754 , JLSEC-2026-118

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia wget_jll 1.21.4+0
  • wget SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 1.20.3-150600.19.12.1
  • wget SLE Micro 5.5 1.20.3-150000.3.29.1
  • wget SLES LTSS Extended Security 12 SP5 1.14-21.22.1

suse advisories SUSE-SU-2025:0425-1SUSE-SU-2025:0380-1SUSE-SU-2025:0366-1

  • wget CBL-Mariner 2.0 1.21.2-1

azure linux advisories AZL-6957

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-31879 updated cvss 6.5

wget: authorization header disclosure on redirect

  • Red Hat Enterprise Linux 6 wget Red Hat Enterprise Linux 7 wget
    affected: workaround, no fix planned “Use `--max-redirect 0` when the request contains Authorization header to prevent wget to redirect the request.”
  • Red Hat Enterprise Linux 8 wget Red Hat Enterprise Linux 9 wget
    affected: workaround, no fix available “Use `--max-redirect 0` when the request contains Authorization header to prevent wget to redirect the request.”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
31 d ago

Exploit prediction

1.10% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N
OSV 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
julia wget_jll
<1.21.4+0
1.21.4+0

Classification

Weakness
  • CWE-601 URL Redirection to Untrusted Site

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.