CVE-2025-49125: Apache Tomcat: Security constraint bypass for pre/post-resources

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-16 · updated 2026-06-17
Weakness: CWE-288

Description

Authentication Bypass Using an Alternate Path or Channel vulnerability in Apache Tomcat. When using PreResources or PostResources mounted other than at the root of the web application, it was possible to access those resources via an unexpected path. That path was likely not to be protected by the same security constraints as the expected path, allowing those security constraints to be bypassed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. 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. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.

Affected products

Apache Tomcat: from 9.0.0 before 9.0.106; from 10.1.0 before 10.1.42; from 11.0.0 before 11.0.8 — fixed in 10.1.42, 11.0.8, 9.0.106

How to fix

Upgrade to a fixed version: Apache Tomcat 10.1.42, 11.0.8, 9.0.106. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2025-49125 or the next vulnerability affects your stack