CVE-2025-66614: Apache Tomcat vulnerability (CVSS 9.1)

Description

Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Older EOL versions are not affected. Tomcat did not validate that the host name provided via the SNI extension was the same as the host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host and the TLS configuration for one of those hosts did not require client certificate authentication but another one did, it was possible for a client to bypass the client certificate authentication by sending different host names in the SNI extension and the HTTP host header field. The vulnerability only applies if client certificate authentication is only enforced at the Connector. It does not apply if client certificate authentication is enforced at the web application. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fix the issue.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Apache Tomcat≥ 10.1.1 < 10.1.50 · ≥ 11.0.1 < 11.0.15 · ≥ 9.0.1 < 9.0.113 · 10.1.0

Remediation

Fixed in

Apache Tomcat≥ 10.1.50

Patch & vendor advisories

https://lists.apache.org/thread/vw6lxtlh2qbqwpb61wd3sv1flm2nttw7

References

https://lists.apache.org/thread/vw6lxtlh2qbqwpb61wd3sv1flm2nttw7Mailing ListVendor Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-66614 being actively exploited?

CVE-2025-66614 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.24%.

How severe is CVE-2025-66614?

CVE-2025-66614 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.24% probability of exploitation.

Which products are affected by CVE-2025-66614?

Affected products include Apache Tomcat.

How do I fix CVE-2025-66614?

Upgrade affected software to a fixed version, for example Apache Tomcat 10.1.50 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-66614 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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