CVE-2026-57871 in MicroRealEstate
Summary
by MITRE • 07/07/2026
Relative path traversal vulnerability in MicroRealEstate file upload functionality allows attackers to potentially overwrite system files.
This issue affects MicroRealEstate: through 1.0.0-alpha3.
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Analysis
by VulDB Data Team • 07/07/2026
A relative path traversal vulnerability exists within the file upload functionality of MicroRealEstate version 1.0.0-alpha3 and earlier releases, creating a critical security risk that allows remote attackers to manipulate the file system by uploading malicious files to unintended locations. This vulnerability stems from insufficient input validation and improper handling of file paths during the upload process, enabling adversaries to craft malicious file names that traverse directory structures using relative path references such as ../ or ..\. The flaw directly maps to CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is a fundamental weakness in path validation mechanisms. When users upload files through the application's interface, the system fails to properly sanitize the file names or implement adequate directory restrictions, allowing attackers to specify paths that resolve outside the intended upload directories.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it creates potential for complete system compromise through strategic file overwrites. Attackers could leverage this weakness to overwrite critical system files, configuration files, or even executable components that would allow them to execute arbitrary code with elevated privileges. The vulnerability also enables potential privilege escalation attacks where adversaries might target system binaries or configuration files that are processed by the application or underlying operating system. According to ATT&CK framework category T1059 - Command and Scripting Interpreter, this vulnerability could facilitate execution of malicious payloads through compromised files. Additionally, the weakness exposes the application to T1566 - Phishing attacks, as attackers might upload malicious content that appears legitimate within the application's interface.
Mitigation strategies must address both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities in future releases. The most critical immediate fix involves implementing strict input validation on all file names, including sanitization of path traversal sequences and enforcement of absolute directory restrictions for file uploads. Organizations should implement a whitelist approach for acceptable file types and reject any upload attempts that contain directory traversal sequences or attempt to write files outside designated directories. Security measures must also include proper access controls and least privilege principles where the application's file upload functionality operates under restricted user accounts with minimal necessary permissions. According to NIST SP 800-53 control CM-7, organizations should implement automated tools for input validation and path sanitization to prevent such vulnerabilities. Regular security testing including dynamic application security testing (DAST) and static application security testing (SAST) should be conducted to identify similar issues in other components of the application. The fix should also include proper logging of file upload activities to detect suspicious patterns and provide forensic evidence for incident response. Additionally, implementing content validation mechanisms that verify file integrity and type can prevent attackers from uploading malicious files disguised as legitimate uploads. Organizations should consider using dedicated file storage systems with built-in security controls rather than relying on application-level file handling for critical operations.