High severity8.8NVD Advisory· Published Dec 19, 2025· Updated Apr 15, 2026

CVE-2023-53956

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Flatnuke/Flatnuxllm-fuzzy
Range: = 2021-03.25

Patches

Vulnerability mechanics

References

flatnux.altervista.org/flatnux.htmlnvd
www.exploit-db.com/exploits/51295nvd
www.vulncheck.com/advisories/flatnux-authenticated-file-upload-remote-code-executionnvd

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