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CVE-2021-43657

MediumPublished

A Stored Cross-site scripting (XSS) vulnerability via MAster.php in Sourcecodetester Simple Client Management System (SCMS) 1.0 allows remote attackers to...

Published: Dec 22, 2022
Updated: Apr 16, 2025
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

5.4/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

0.7%

Low · next 30 days

Percentile: 51.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

A Stored Cross-site scripting (XSS) vulnerability via MAster.php in Sourcecodetester Simple Client Management System (SCMS) 1.0 allows remote attackers to inject arbitrary web script or HTML via the vulnerable input fields.

Sources

CVE-2021-43657PoC
Proof-of-concept and reference implementation for CVE-2021-43657, a vulnerability found in an Employee Task Management System, demonstrating exploitation techniques for educational purposes.

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