CVE-2025-59342
BaseFortify
Publication date: 2025-09-17
Last updated on: 2025-09-18
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| esm-dev | esm.sh | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-24 | The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "../" sequences that can resolve to a location that is outside of that directory. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a path-traversal flaw in esm.sh versions 136 and earlier. It occurs because the application uses the X-Zone-Id HTTP header value to build a filesystem path without properly validating or restricting it. An attacker can supply '../' sequences in this header to cause the application to write files outside its intended storage directory, potentially overwriting or creating files in arbitrary locations on the server.
How can this vulnerability impact me? :
This vulnerability can allow an attacker to write files to arbitrary directories on the server hosting esm.sh. This could lead to unauthorized file creation or modification, potentially compromising the integrity of the system, enabling further attacks, or causing data loss or service disruption.