CVE-2021-47918

Name: CVE-2021-47918
Creator: NVD / NIST
Published: 2026-02-01T13:15:56.237+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2021-47918 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. Simple CMS 2.1 contains a remote SQL injection vulnerability that allows privileged attackers to inject unfiltered SQL commands in the users module. Attackers can exploit unvalidated input parameters in the admin.php file to compromise the database management system and web application.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

Simple CMS 2.1 contains a remote SQL injection vulnerability that allows privileged attackers to inject unfiltered SQL commands in the users module. Attackers can exploit unvalidated input parameters in the admin.php file to compromise the database management system and web application.

Metrics

CVSS 3.1

8.8/10

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

CVSS 4.0

8.6/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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

0.51%

39.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Simplephpscripts	Simple Cms Php	2.1

References

https://simplephpscripts.com/simple-cms-phpProduct
https://www.vulncheck.com/advisories/simple-cms-sql-injection-vulnerability-via-users-module2Broken Link
https://www.vulnerability-lab.com/get_content.php?id=2303Exploit, Third Party Advisory

Timeline

Published: Feb 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-47918?

How severe is CVE-2021-47918?

CVE-2021-47918 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47918?

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-2021-47918?

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

Scan your code now

Source: NVD / NIST