CVE-2021-4462

Name: CVE-2021-4462
Creator: NVD / NIST
Published: 2025-11-10T23:15:40.967+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 2.99%

Last modified Jun 17, 2026

CVE-2021-4462 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. Employee Records System version 1.0 contains an unrestricted file upload vulnerability that allows a remote unauthenticated attacker to upload arbitrary files via the uploadID.php endpoint; uploaded files can be executed because the application does not perform proper server-side validation. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.. EPSS estimates a 2.99% chance of exploitation in the next 30 days.

Description

Employee Records System version 1.0 contains an unrestricted file upload vulnerability that allows a remote unauthenticated attacker to upload arbitrary files via the uploadID.php endpoint; uploaded files can be executed because the application does not perform proper server-side validation. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

9.3/10

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/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

EPSS Probability

2.99%

85.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Skittles	Employee Records System	1.0

References

https://www.exploit-db.com/exploits/49596Exploit
https://www.sourcecodester.com/php/11393/employee-records-system.htmlProduct
https://www.vulncheck.com/advisories/employees-records-system-arbitrary-file-upload-rceThird Party Advisory
https://www.exploit-db.com/exploits/49596Exploit

Timeline

Published: Nov 10, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-4462?

How severe is CVE-2021-4462?

CVE-2021-4462 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 2.99% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4462?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4462?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST