CVE-2023-53956

Flatnux 2021-03.25 Authenticated File Upload Remote Code Execution

CVSS 8.7 HIGHEPSS 0.7%CWE-434

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.7EPSS 0.7%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

19 Dec 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

altervista · flatnux

References

http://flatnux.altervista.org/flatnux.html https://www.exploit-db.com/exploits/51295 https://www.vulncheck.com/advisories/flatnux-authenticated-file-upload-remote-code-execution