CVE-2018-25091: Authorization Header forwarded on redirect

CVE-2018-25091 · Severity: low · CVSS 3.1 · Published 2023-10-15

urllib3 before 1.24.2 does not remove the authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the authorization header to be exposed to unintended hosts or transmitted in cleartext. NOTE: this issue exists because of an incomplete fix for CVE-2018-20060 (which was case-sensitive).

Technologies: urllib3 (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2018-25091 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2018-25091 being exploited in the wild.
How severe is CVE-2018-25091?
Low severity, with a CVSS score of 3.1, published 15 October 2023.
Which products and versions are affected?
urllib3 (PyPI) ECOSYSTEM:introduced=0,fixed=1.24.2, GIT:introduced=0,fixed=adb358f8e06865406d1f05e581a16cbea2136fbc|ECOSYSTEM:introduced=0,fixed=1.24.2.
Is there a fix for CVE-2018-25091?
Yes. urllib3 (PyPI): upgrade to 1.24.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2018-25091?
Check whether you run urllib3 (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • urllib3 (PyPI): upgrade to 1.24.2 or later
    pip install "urllib3>=1.24.2"

Affected products

  • urllib3 (PyPI) ECOSYSTEM:introduced=0,fixed=1.24.2, GIT:introduced=0,fixed=adb358f8e06865406d1f05e581a16cbea2136fbc|ECOSYSTEM:introduced=0,fixed=1.24.2

Identifiers

  • CVE-2018-25091
  • GHSA-gwvm-45gx-3cf8
  • PYSEC-2023-207

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