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

Quick assessment

Affected
Cisco Cisco Duo Authentication Proxy
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Duo Authentication Proxy是美国思科（Cisco）公司的一个本地安全服务。 Cisco Duo Authentication Proxy存在信息泄露漏洞，该漏洞源于系统日志文件敏感信息掩码不足，可能导致高权限用户查看敏感信息。

CVSS 4.9 · Medium EPSS 0.48% · P40

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2025-20345

Vulnerability Information
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Vulnerability Title
Cisco Duo Authentication Proxy Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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. 
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Duo Authentication Proxy 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Duo Authentication Proxy是美国思科（Cisco）公司的一个本地安全服务。 Cisco Duo Authentication Proxy存在信息泄露漏洞，该漏洞源于系统日志文件敏感信息掩码不足，可能导致高权限用户查看敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Duo Authentication Proxy 2.4.2 -

II. Public POCs for CVE-2025-20345

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III. Intelligence Information for CVE-2025-20345

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Same Patch Batch · Cisco · 2025-08-20 · 3 CVEs total

CVE-2025-20269 6.5 MEDIUM Cisco Evolved Programmable Network Manager and Prime Infrastructure Arbitrary File Downloa
CVE-2025-20131 4.9 MEDIUM Cisco Identity Services Engine Arbitrary File Upload Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Duo Authentication Proxy
Same vendor: Cisco
Same weakness: CWE-200

V. Comments for CVE-2025-20345

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