CVE-2025-20345 MEDIUM

CVE-2025-20345: Cisco Duo Authentication Proxy Information Disclosure Vulnerability

Vendor Cisco
Product Cisco Duo Authentication Proxy
Weakness CWE-200 · Info exposure
Published August 20, 2025
Last update August 20, 2025

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

A vulnerability in the debug logging function of Cisco Duo Authentication Proxy could allow an authenticated, high-privileged, remote attacker to view sensitive information in a system log file. This vulnerability is due to insufficient masking of sensitive information before it is written to system log files. An attacker could exploit this vulnerability by accessing logs on an affected system. A successful exploit could allow the attacker to view sensitive information that should be restricted. 

Key dates

02Disclosure timeline

August 20, 2025 CVE published
August 20, 2025 Record updated