CVE-2021-4462CWE-434

Employee Records System v1.0 Arbitrary File Upload RCE

Critical · published November 10, 2025

CVSS v4.0
9.3
EPSS
3%
Percentile
88.9
In the wild
Unconfirmed
What it is

🚨 An unrestricted file upload vulnerability lurks in Employee Records System v1.0, allowing attackers to upload any file they wish — it’s like giving the cleaning staff a spare key and forgetting to change the locks! 🔥 Imagine you run a restaurant, and a delivery person is allowed to drop off any package in the kitchen without checking what's inside. If that package is a bomb instead of fresh ingredients, chaos is inevitable! An attacker could exploit this vulnerability to upload malicious files, potentially executing harmful code on the server. This could lead to data breaches, unauthorized access, and even total system compromise — all while bypassing security checks like a thief slipping through a wide-open back door!

Put simply

Imagine you run a restaurant, and a delivery person is allowed to drop off any package in the kitchen without checking what's inside. If that package is a bomb instead of fresh ingredients, chaos is inevitable! The vulnerability stems from the uploadID.php endpoint, which lacks proper server-side validation for uploaded files, allowing arbitrary code execution. Any file uploaded can be executed by the server, posing a significant risk to the integrity of the system.

What to do

An attacker could exploit this vulnerability to upload malicious files, potentially executing harmful code on the server. This could lead to data breaches, unauthorized access, and even total system compromise — all while bypassing security checks like a thief slipping through a wide-open back door! To mitigate this vulnerability, patch to the latest version immediately, ensure that the file upload functionality includes rigorous validation checks, and implement restrictions on file types and sizes. Additionally, consider using a secure sandbox environment for execution of uploaded files. You’ve got this! Act quickly, and you’ll shore up your defenses in no time! 🛡️

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.03417 · 88.9th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2025-11-10T22:32Z
EPSS history
Timeline
  • 10 NOV 22:32Z
    Employee Records System v1.0 Arbitrary File Upload RCE
    cvelistv5