CVE-2023-53956
HIGH EPSS 47.1%
Published Dec 19, 20256mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
Published Dec 19, 2025 6mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
47.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-434 Unrestricted Upload of File with Dangerous Type Resource Mgmt
References 3
- flatnux.altervista.org http://flatnux.altervista.org/flatnux.html
- exploit-db.com https://www.exploit-db.com/exploits/51295
- vulncheck.com https://www.vulncheck.com/advisories/flatnux-authenticated-file-upload-remote-code-execution
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.