Vulnerability · Published Jun 19, 2025 · Assigned by apache

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

High 7.5

In plain English

A high-severity improper access control in Apache Traffic Server from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 53.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	trafficserver	9.2.5+ds-0+deb12u3	DEBIAN-CVE-2025-31698
Debian:12	trafficserver	9.2.5+ds-0+deb12u3	DSA-5948-1
Ubuntu:24.04:LTS	trafficserver	no fix listed	UBUNTU-CVE-2025-31698
Ubuntu:25.10	trafficserver	no fix listed	UBUNTU-CVE-2025-31698

Affected products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache Traffic Server	10.0.0 – through 10.0.69.0.0 – through 9.2.10

Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://lists.apache.org/thread/15t32nxbypqg1m2smp640vjx89o6v5f8 vendor-advisory