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CVE-2025-31698— Apache Traffic Server: Client IP address from PROXY protocol is not used for ACL

Quick assessment

Affected
Apache Software Foundation Apache Traffic Server
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.

Apache Traffic Server（ATS）是美国阿帕奇（Apache）基金会的一套可扩展的HTTP代理和缓存服务器。 Apache Traffic Server（ATS） 10.0.0至10.0.6版本和9.0.0至9.2.10版本存在访问控制错误漏洞，该漏洞源于ACL配置未使用PROXY协议提供的IP地址。

AI Predicted 5.3 Difficulty: Easy EPSS 0.55% · P44

Possible ATT&CK Techniques 1 AI

T1552 · Unsecured Credentials
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I. Basic Information for CVE-2025-31698

Vulnerability Information
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Vulnerability Title
Apache Traffic Server: Client IP address from PROXY protocol is not used for ACL
Source: CVE Program / CVE List V5
Vulnerability Description
ACL configured in ip_allow.config or remap.config does not use IP addresses that are provided by PROXY protocol. Users can use a new setting (proxy.config.acl.subjects) to choose which IP addresses to use for the ACL if Apache Traffic Server is configured to accept PROXY protocol.  This issue affects undefined: from 10.0.0 through 10.0.6, from 9.0.0 through 9.2.10. Users are recommended to upgrade to version 9.2.11 or 10.0.6, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Traffic Server（ATS） 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Traffic Server（ATS）是美国阿帕奇（Apache）基金会的一套可扩展的HTTP代理和缓存服务器。 Apache Traffic Server（ATS） 10.0.0至10.0.6版本和9.0.0至9.2.10版本存在访问控制错误漏洞，该漏洞源于ACL配置未使用PROXY协议提供的IP地址。
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
Apache Software Foundation Apache Traffic Server 10.0.0 ~ 10.0.6 -

II. Public POCs for CVE-2025-31698

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III. Intelligence Information for CVE-2025-31698

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Same Patch Batch · Apache Software Foundation · 2025-06-19 · 3 CVEs total

CVE-2025-32896 Apache SeaTunnel: Unauthenticated insecure access
CVE-2025-49763 Apache Traffic Server: Remote DoS via memory exhaustion in ESI Plugin

IV. Related Vulnerabilities

Same product: Apache Traffic Server
Same vendor: Apache Software Foundation
Same weakness: CWE-284

V. Comments for CVE-2025-31698

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