CVE-2025-24813 PoC — Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT

Title:Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT (CVE-2025-24813)
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.

# CVE-2025-24813-noPoC

After countless hours I was unable to come up with any real PoC.

While the deserialization of uploaded files *could* pose a threat, all payload-chains I tested failed.

Tested on versions 9.0.90 and 10.1.15 of Apache Tomcat

**Nothing else to see here!**


SEVERE [http-nio-8080-exec-5] org.apache.catalina.core.StandardHostValve.invoke Exception Processing /
        java.lang.RuntimeException: IllegalAccessException: java.lang.IllegalAccessException: class org.apache.commons.beanutils.PropertyUtilsBean cannot access class com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl (in module java.xml) because module java.xml does not export com.sun.org.apache.xalan.internal.xsltc.trax to unnamed module @7c53a9eb


SEVERE [http-nio-8080-exec-2] org.apache.catalina.core.StandardHostValve.invoke Exception Processing /
        org.apache.commons.collections.FunctorException: InvokerTransformer: The method 'newTransformer' on 'class com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl' cannot be accessed

...

 [4.0K]  /data/pocs/4f7d026c0904e635b7e2a4f690f122ff21c48e2c
└── [1.0K]  README.md

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