Full Report
Remote Code Execution via Unrestricted File Upload vulnerability (CVE-2026-5482) has been found in Responsive FileManager software.
Analysis Summary
# Vulnerability: Remote Code Execution in Responsive FileManager
## CVE Details
- **CVE ID:** CVE-2026-5482
- **CVSS Score:** 9.8 (Critical) - *Calculated based on unauthenticated RCE impact*
- **CWE:** CWE-434: Unrestricted Upload of File with Dangerous Type
## Affected Systems
- **Products:** Tecrail Responsive FileManager
- **Versions:** All versions through 9.14.0 (inclusive)
- **Configurations:** Systems where the `dialog.php` endpoint is accessible.
## Vulnerability Description
Responsive FileManager contains a flaw where the application fails to properly validate or restrict the types of files uploaded through the `dialog.php` endpoint. An unauthenticated remote attacker can exploit this by uploading a malicious script (such as a PHP shell). Because the application does not enforce an allow-list of safe extensions, the uploaded file can be executed on the server, leading to full Remote Code Execution (RCE).
## Exploitation
- **Status:** PoC available (Technically verified; project is currently unmaintained)
- **Complexity:** Low
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High (Full access to server files and database)
- **Integrity:** High (Ability to modify or delete any data on the server)
- **Availability:** High (Potential for complete system takeover or service disruption)
## Remediation
### Patches
- **No patch available.** The project is documented as unmaintained at the time of the CVE assignment. The latest release (9.14.0) remains vulnerable.
### Workarounds
- **Access Control:** Restrict access to the Responsive FileManager directory (especially `dialog.php`) using web server authentication (e.g., .htaccess/htpasswd) or IP whitelisting.
- **Disable File Execution:** Configure the web server to disable the execution of scripts (like PHP) within the upload directory.
- **Software Migration:** Given the unmaintained status of the software and the critical nature of the flaw, it is strongly recommended to migrate to a supported file management solution.
## Detection
- **Indicators of Compromise:** Look for unexpected PHP files or scripts in the upload directories typically managed by the FileManager.
- **Log Analysis:** Scrutinize `POST` requests directed at `dialog.php`, particularly from unauthorized or unknown IP addresses.
- **File Integrity Monitoring:** Monitor for the creation of executable files in web-accessible directories.
## References
- CERT Polska Advisory: hxxps[://]cert[.]pl/en/posts/2026/06/CVE-2026-5482/
- CVE Record: hxxps[://]www[.]cve[.]org/CVERecord?id=CVE-2026-5482
- CWE-434 Definition: hxxps[://]cwe[.]mitre[.]org/data/definitions/434[.]html