CVE-2023-53956
Flatnux 2021-03.25 Authenticated File Upload Remote Code Execution
- State
- Published
- Severity
- 8.7 High
- Published
- Dec 19, 2025
- Updated
- Apr 7, 2026
- Reserved
- Dec 19, 2025
Description
Flatnux 2021-03.25 contains an authenticated file upload vulnerability that allows administrative users to upload arbitrary PHP files through the file manager. Attackers with admin credentials can upload malicious PHP scripts to the web root directory, enabling remote code execution on the server.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products
| Product | Versions |
|---|---|
flatnuxaltervista |
|
References
- ExploitDB-51295exploit
- Official Product Homepageproduct
- VulnCheck Advisory: Flatnux 2021-03.25 Authenticated File Upload Remote Code Executionthird-party-advisory
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