Platform
php
Component
phpgurukul-user-registration-login-and-user-management-system
Fixed in
3.3.1
CVE-2026-5543 describes a SQL Injection vulnerability discovered in PHPGurukul User Registration & Login and User Management System. This flaw allows attackers to inject malicious SQL code, potentially compromising sensitive data. The vulnerability affects version 3.3 and is publicly exploitable, requiring immediate attention. A fix is pending, and mitigation strategies are crucial.
Successful exploitation of CVE-2026-5543 allows an attacker to execute arbitrary SQL queries against the database underlying the PHPGurukul User Registration & Login and User Management System. This could lead to unauthorized access to user credentials, sensitive personal information, and potentially even administrative privileges. The attacker could modify, delete, or exfiltrate data, leading to significant data breaches and disruption of service. Given the publicly available exploit, the risk of exploitation is high, particularly for systems with default configurations or inadequate security measures. The blast radius extends to all data stored within the database accessible through the vulnerable query.
CVE-2026-5543 is a publicly exploitable vulnerability with a readily available proof-of-concept. It was disclosed on 2026-04-05. The vulnerability's ease of exploitation and public availability suggest a high probability of active exploitation. It is not currently listed on the CISA KEV catalog, but its severity and public exploit warrant close monitoring.
Exploit Status
EPSS
0.03% (9% percentile)
CISA SSVC
CVSS Vector
While a patch is pending, several mitigation steps can be taken to reduce the risk of exploitation. First, implement strict input validation on the 'ID' parameter in /admin/yesterday-reg-users.php, ensuring it conforms to expected data types and lengths. Secondly, deploy a Web Application Firewall (WAF) with rules to detect and block SQL Injection attempts targeting this specific endpoint. Consider using parameterized queries or prepared statements within the application code to prevent SQL Injection vulnerabilities. Regularly review and update database user permissions to limit the potential damage from a successful attack. After implementing these mitigations, test the application thoroughly to ensure functionality remains intact and the vulnerability is effectively blocked.
Update the PHPGurukul User Registration & Login and User Management System to a patched version. Verify the vendor documentation for specific upgrade instructions. As public exploitation is available, applying the fix as soon as possible is recommended.
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CVE-2026-5543 is a SQL Injection vulnerability affecting PHPGurukul User Registration & Login and User Management System version 3.3, allowing attackers to inject malicious SQL code.
If you are using PHPGurukul User Registration & Login and User Management System version 3.3, you are potentially affected and should implement mitigation steps immediately.
A patch is pending. Implement input validation, WAF rules, and parameterized queries as temporary mitigations until a fix is released.
Due to the publicly available exploit, there is a high probability of active exploitation.
Refer to the PHPGurukul website and security mailing lists for the official advisory regarding CVE-2026-5543.
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