CVE-2025-31698Network attack vector

ACL bypass via ignored PROXY client address

Published Jun 19, 2025 · Updated Jun 20, 2025

Improper access control in Apache Traffic Server 9.0.0 through 9.2.10 and 10.0.0 through 10.0.6 allows remote attackers to bypass IP ACLs. The ip_allow.config and remap.config ACL paths evaluate the TCP peer address instead of the originating address supplied by PROXY protocol. Exposure requires PROXY protocol on the listening port and an IP-based ACL, allowing unauthorized access to resources restricted by client address.

CVSS severity7.5
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Apache Traffic Server 9.0.0 through 9.2.10 and 10.0.0 through 10.0.6 allows remote attackers to bypass IP ACLs. The ip_allow.config and remap.config ACL paths evaluate the TCP peer address instead of the originating address supplied by PROXY protocol. Exposure requires PROXY protocol on the listening port and an IP-based ACL, allowing unauthorized access to resources restricted by client address.

The record

CVE
CVE-2025-31698
Published
Jun 19, 2025
Updated
Jun 20, 2025
Vendor
The Apache Software Foundation
Product
Apache Traffic Server
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.0 <=10.0.6
  2. Affected versionversion=9.0.0 <=9.2.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Traffic Serverversion=10.0.0 <=10.0.6; version=9.0.0 <=9.2.10

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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