CVE-2021-47916
Unknown Unknown - Not Provided

Remote SQL Injection in Simple CMS 2.1 Users Module

Publication date: 2026-02-01

Last updated on: 2026-02-01

Assigner: VulnCheck

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.

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Meta Information

Published
2026-02-01
Last Modified
2026-02-01
Generated
2026-07-06
AI Q&A
2026-02-01
EPSS Evaluated
N/A
NVD
CVE-2021-47916
EUVD
EUVD-2021-34755

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
unknown_vendor simple_cms to 2.1 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

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Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

CVE-2021-47916 is a high-severity remote SQL injection vulnerability in Simple CMS version 2.1 and earlier, specifically in the users module. It allows privileged attackers to inject malicious SQL commands through unvalidated input parameters in the admin.php file. This can compromise the database management system and the web application by executing unauthorized SQL commands. [1]

Impact Analysis

This vulnerability can lead to compromise of the database and web application, allowing attackers to breach data confidentiality and integrity. Attackers with some level of privilege can manipulate or access sensitive data, potentially causing data breaches or unauthorized data manipulation. [1]

Mitigation Strategies

To mitigate this vulnerability, ensure that all input parameters in the admin.php file, especially in the users module, are properly validated and sanitized to prevent SQL injection. Limit privileges to only necessary users to reduce risk, and apply any available patches or updates for Simple CMS version 2.1 or earlier. Additionally, monitor and restrict access to the admin.php file to trusted users only. [1]

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