Relative Path Traversal in MicroRealEstate File Upload

Executive Summary

CVE-2026-57871 is a relative path traversal vulnerability in the MicroRealEstate Client Portal Remote Support software, specifically affecting versions 1.0.0-alpha3 and earlier.

The vulnerability arises because user-controlled parameters in URLs are used to determine file paths during file uploads, allowing attackers to manipulate parts of the file path.

This manipulation enables attackers to write files to unauthorized directories, potentially overwriting system files.

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Detection Guidance

This vulnerability involves a relative path traversal in the file upload functionality of MicroRealEstate versions up to 1.0.0-alpha3, where user-controlled URL parameters determine file paths. Detection would involve monitoring for unusual file upload requests that include path traversal patterns such as '../' sequences in the URL or file path parameters.

To detect potential exploitation attempts on your system or network, you can search web server logs for suspicious file upload requests containing path traversal sequences.

• Use grep or similar tools to search for '../' or '..\' patterns in access logs, for example: grep -E "\.\./|\.\.\\" /var/log/nginx/access.log
• Monitor HTTP POST requests to the file upload endpoint for unusual or unexpected file path parameters.
• If you have access to the application source or logs, check for any file writes outside the intended upload directory.

Note that as of the provided information, there are no fixed versions available, so monitoring and restricting file upload inputs is critical.

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Impact Analysis

This vulnerability can allow attackers to overwrite critical system files by uploading files to unauthorized locations.

Such unauthorized file overwriting can corrupt the platform, potentially leading to system instability, data loss, or unauthorized control over the affected system.

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Mitigation Strategies

As of the provided information, there are no fixed versions available to address this vulnerability.

To mitigate the risk, you should restrict access to the file upload functionality to trusted users only and monitor file uploads closely for suspicious activity.

Additionally, consider implementing input validation and sanitization on file paths to prevent path traversal attempts.

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Compliance Impact

The provided information does not specify how the relative path traversal vulnerability in MicroRealEstate affects compliance with common standards and regulations such as GDPR or HIPAA.

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