VULNERABILITY INTELLIGENCE

CVE-2018-25091

CVSS score6.1 MEDIUM
EPSS probability0.59%
CISA KEVNot currently listed
Published2023-10-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

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).

Weakness classification

  • CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Primary references