How severe is CVE-2025-31698?

CVE-2025-31698 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-31698 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-31698?

CVE-2025-31698 affects Apache Traffic Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-31698?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-31698 have an EU (EUVD) identifier?

Yes. CVE-2025-31698 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18750.

When was CVE-2025-31698 published?

CVE-2025-31698 was published on 2025-06-19 and last updated on 2026-06-17.

CVE-2025-31698

CVE-2025-31698 is a high-severity vulnerability in Apache Traffic Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18750
Weakness: CWE-284
Affected product: Apache Traffic Server
Published: 2025-06-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-31698?: 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.
How severe is CVE-2025-31698?: CVE-2025-31698 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-31698 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-31698?: CVE-2025-31698 affects Apache Traffic Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-31698?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-31698 have an EU (EUVD) identifier?: Yes. CVE-2025-31698 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18750.
When was CVE-2025-31698 published?: CVE-2025-31698 was published on 2025-06-19 and last updated on 2026-06-17.

References

https://lists.apache.org/thread/15t32nxbypqg1m2smp640vjx89o6v5f8

Affected products (1)

cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*

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