Apache Traffic Server ACL ignores PROXY IP – CVE-2025-31698
CVE-2025-31698 Published on June 19, 2025
Apache Traffic Server: Client IP address from PROXY protocol is not used for ACL
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.
Vulnerability Analysis
CVE-2025-31698 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2025-31698 has been classified to as an Authorization vulnerability or weakness.
Products Associated with CVE-2025-31698
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Affected Versions
Apache Software Foundation Apache Traffic Server:- Version 10.0.0, <= 10.0.6 is affected.
- Version 9.0.0, <= 9.2.10 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.