Published Jun 11, 2025Sources checked Nov 11, 2026
6.8MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2025-4673 and is rated Medium severity with a CVSS score of 6.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Sep 17, 2026
Vendor remediation details
CBL-Mariner Releases
Vendor-listed releases
1.24.1-3
1.23.10-1
1.18.8-9
1.22.7-5
1.24.4-1
CISA KEVNot listedBased on the latest collected catalog
EPSS0.7%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2025-4673?
Proxy-Authorization and Proxy-Authenticate headers persisted on cross-origin redirects potentially leaking sensitive information.