CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability

Vulnerability summary

CVE-2025-24813 is a critical (CVSS 10.0) vulnerability in Apache Tomcat. It is known to be exploited: CISA lists it, first on 01-04-2025. EPSS estimates a 99.94% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 3 public exploits are recorded.

Timeline

1. 10-03-2025
   PublishedVulnerability first disclosed.
2. 01-04-2025
   Added to CISA KEVExploitedApache Tomcat Path Equivalence Vulnerability
3. 22-04-2025
   CISA remediation dueDeadline passedApply mitigations per vendor instructions.
4. 29-10-2025
   Last modifiedVulnerability information updated.

Description

Path Equivalence: 'file.Name' (Internal Dot) leading to Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Default Servlet in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.2, from 10.1.0-M1 through 10.1.34, from 9.0.0.M1 through 9.0.98. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. If all of the following were true, a malicious user was able to view security sensitive files and/or inject content into those files: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - a target URL for security sensitive uploads that was a sub-directory of a target URL for public uploads - attacker knowledge of the names of security sensitive files being uploaded - the security sensitive files also being uploaded via partial PUT If all of the following were true, a malicious user was able to perform remote code execution: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - application was using Tomcat's file based session persistence with the default storage location - application included a library that may be leveraged in a deserialization attack Users are recommended to upgrade to version 11.0.3, 10.1.35 or 9.0.99, which fixes the issue.

• CWE-44Path Equivalence: 'file.name' (Internal Dot)The product accepts path input in the form of internal dot ('file.ordir') without appropriate validation, which can lead to ambiguous path resolution and allow an attacker to traverse the file system to unintended locations or access arbitrary files.
• CWE-502Deserialization of Untrusted DataThe product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
• CWE-706Use of Incorrectly-Resolved Name or ReferenceThe product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.