CVE-2025-31698: apache software foundation apache traffic server Improper Access Control
Vulnerability summary
CVE-2025-31698 is a high (CVSS 7.5) Improper Access Control vulnerability in apache software foundation apache traffic server. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 45% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 19-06-2025PublishedVulnerability first disclosed.
- 20-06-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.55%
Chance of exploitation in the next 30 days
Percentile
45%
Versus all other CVEs
30-day change
+0.04 pp
From 0.52% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apache1 product
- traffic_server≥ 9.0.0, < 9.2.11 | ≥ 10.0.0, < 10.0.6
Apache software foundation1 product
- apache traffic server≥ 10.0.0, ≤ 10.0.6 | ≥ 9.0.0, ≤ 9.2.10
Debian1 product
- trafficserver< 9.2.5+ds-0+deb12u3
Ubuntu1 product
- trafficserverAll versions (No fix recorded)
4 vendors · 4 products
