CVE-2025-55752: Apache Tomcat: Directory traversal via rewrite with possible RCE if PUT is enabled

[Mark Thomas <markt () apache org>]

Severity: important

Affected versions:

- Apache Tomcat 11.0.0-M1 through 11.0.10
- Apache Tomcat 10.1.0-M1 through 10.1.44
- Apache Tomcat 9.0.0.M11 through 9.0.108
- Apache Tomcat 8.5.6 through 8.5.100
- Apache Tomcat 3 before 8.5.0 unknown

Description:

Relative Path Traversal vulnerability in Apache Tomcat.

The fix for bug 60013 introduced a regression where the       rewritten 
URL was normalized before it was decoded. This introduced the 
possibility that, for rewrite rules that rewrite query parameters to the 
      URL, an attacker could manipulate the request URI to bypass 
security       constraints including the protection for /WEB-INF/ and 
/META-INF/. If PUT requests were also enabled then malicious files could 
be uploaded leading to remote code execution. PUT requests are normally 
limited to trusted users and it is considered unlikely that PUT requests 
would be enabled in conjunction with a rewrite that manipulated the URI.



This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.10, from 
10.1.0-M1 through 10.1.44, from 9.0.0.M11 through 9.0.108.

The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.6 though 8.5.100. Other, older, EOL versions 
may also be affected.
Users are recommended to upgrade to version 11.0.11 or later, 10.1.45 or 
later or 9.0.109 or later, which fix the issue.

Credit:

Chumy Tsai (github.com/Jimmy01240397) @ CyCraft Technology Intern (finder)

References:

https://lists.apache.org/thread/n05kjcwyj1s45ovs8ll1qrrojhfb1tog
https://tomcat.apache.org/
https://www.cve.org/CVERecord?id=CVE-2025-55752