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Exposure of Sensitive Information to an Unauthorized Actor in urllib3

Critical severity GitHub Reviewed Published Dec 12, 2018 to the GitHub Advisory Database • Updated Sep 7, 2023

Package

pip urllib3 (pip)

Affected versions

< 1.23

Patched versions

1.23

Description

urllib3 before version 1.23 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.

References

Published by the National Vulnerability Database Dec 11, 2018
Published to the GitHub Advisory Database Dec 12, 2018
Reviewed Jun 16, 2020
Last updated Sep 7, 2023

Severity

Critical
9.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CVE ID

CVE-2018-20060

GHSA ID

GHSA-www2-v7xj-xrc6

Source code

No known source code
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