Arbitrary file write via unvalidated ZIP entries
Published Dec 14, 2022 · Updated Apr 15, 2025
Path traversal in bspkrs MCP Mapping Viewer allows remote attackers to write files outside the extraction directory via a crafted ZIP entry. RemoteZipHandler.extractZip joins each untrusted entry name to destDir and, before the patch, writes it without verifying that the normalized path remains beneath that directory. No authentication is required, but exploitation requires the application to process an attacker-controlled archive, and the resulting file write is limited by the application's filesystem permissions.
Summary
What happened
Path traversal in bspkrs MCP Mapping Viewer allows remote attackers to write files outside the extraction directory via a crafted ZIP entry. RemoteZipHandler.extractZip joins each untrusted entry name to destDir and, before the patch, writes it without verifying that the normalized path remains beneath that directory. No authentication is required, but exploitation requires the application to process an attacker-controlled archive, and the resulting file write is limited by the application's filesystem permissions.
The record
- CVE
- CVE-2022-4494
- Published
- Dec 14, 2022
- Updated
- Apr 15, 2025
- Vendor
- bspkrs
- Product
- MCP Mapping Viewer
- Classifications
- CWE-22, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 14, 2022CVE publishedPublication date reported by the CVE source.
- Apr 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=n/a
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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