CVE-2025-27553: Apache Commons VFS: Possible path traversal issue when using NameScope.DESCENDENT
First published: Sun Mar 23 2025(Updated: )
Relative Path Traversal vulnerability in Apache Commons VFS before 2.10.0. The FileObject API in Commons VFS has a 'resolveFile' method that takes a 'scope' parameter. Specifying 'NameScope.DESCENDENT' promises that "an exception is thrown if the resolved file is not a descendent of the base file". However, when the path contains encoded ".." characters (for example, "%2E%2E/bar.txt"), it might return file objects that are not a descendent of the base file, without throwing an exception. This issue affects Apache Commons VFS: before 2.10.0. Users are recommended to upgrade to version 2.10.0, which fixes the issue.
Credit: security@apache.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apache Commons VFS | <2.10.0 | |
| maven/org.apache.commons:commons-vfs2 | <2.10.0 | 2.10.0 |
| Apache Commons VFS | <2.10.0 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-27553?
CVE-2025-27553 is classified as a medium severity vulnerability due to its potential to allow unauthorized file access.
How do I fix CVE-2025-27553?
To fix CVE-2025-27553, upgrade Apache Commons VFS to version 2.10.0 or later, which contains the necessary patch.
What is affected by CVE-2025-27553?
CVE-2025-27553 affects Apache Commons VFS versions prior to 2.10.0.
What type of vulnerability is CVE-2025-27553?
CVE-2025-27553 is a relative path traversal vulnerability that can lead to unauthorized access to files.
How does CVE-2025-27553 exploit the resolveFile method?
CVE-2025-27553 exploits the resolveFile method by allowing malicious input to bypass intended file path restrictions through the 'scope' parameter.
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