CVE-2026-77392 in Dynamic Input Field Generator Using HTML, CSS, and PHP
Summary
by MITRE • 08/21/2026
A weakness has been identified in SourceCodester Dynamic Input Field Generator Using HTML, CSS, and PHP 1.0. This impacts the function saveUser of the file /public/submit.php. This manipulation of the argument Researcher causes sql injection. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks.
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Analysis
by VulDB Data Team • 08/21/2026
The identified vulnerability in SourceCodester Dynamic Input Field Generator Using HTML, CSS, and PHP version 1.0 represents a critical security flaw within its user data handling mechanisms. Specifically, the weakness resides in the saveUser function located in the /public/submit.php file. This component is responsible for processing input provided by users to create or update records in the backend database. The application fails to adequately sanitize or validate the Researcher argument before incorporating it into SQL queries. This lack of proper input validation allows an attacker to inject malicious SQL code directly into this parameter, bypassing intended logic and executing arbitrary commands against the underlying database management system.
This vulnerability is classified as a classic example of SQL Injection, which corresponds to CWE-89 in the Common Weakness Enumeration standard. The core technical flaw involves the direct concatenation or interpolation of user-supplied data from the Researcher field into an SQL statement without employing parameterized queries or prepared statements. By manipulating this specific argument, an attacker can alter the structure of the executed query. This capability enables a range of malicious activities including unauthorized access to sensitive data such as usernames and passwords, modification or deletion of existing records, and potentially gaining control over the database server depending on its configuration privileges.
The operational impact of this vulnerability is severe due to its remote exploitability. Since the affected function resides in /public/submit.php, it is accessible via standard HTTP requests from any external network location without requiring prior authentication. This means that an unauthenticated attacker can initiate attacks remotely over the internet. The availability of public exploits significantly lowers the barrier for entry, allowing individuals with limited technical expertise to leverage existing tools and scripts to compromise the system. Successful exploitation could lead to a complete breach of data integrity and confidentiality, resulting in significant reputational damage and potential regulatory compliance violations depending on the nature of the stored data.
To mitigate this risk, immediate remediation is required by refactoring the saveUser function to utilize prepared statements with parameterized queries for all database interactions involving user input. This approach ensures that the database treats injected strings as literal data rather than executable code, effectively neutralizing SQL injection attempts. Additionally, implementing strict server-side validation and sanitization routines for all incoming parameters provides a secondary layer of defense. Deploying a Web Application Firewall can also help detect and block common SQL injection patterns in real-time while longer-term architectural improvements are implemented to enforce secure coding practices across the entire application lifecycle.