CVE-2025-2984: Payroll Management System SQLi Vulnerability

CVE-2025-2984 Overview

CVE-2025-2984 is a SQL injection vulnerability in code-projects Payroll Management System 1.0. The flaw resides in the /delete.php script, where the emp_id parameter is passed unsanitized into a database query. Remote attackers with low-privileged access can manipulate the parameter to inject arbitrary SQL statements. The exploit details have been publicly disclosed, increasing the likelihood of opportunistic exploitation against exposed deployments. The vulnerability is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Authenticated remote attackers can inject SQL through the emp_id parameter in /delete.php, enabling tampering or extraction of payroll data.

Affected Products

code-projects Payroll Management System 1.0
Fabian Payroll Management System (CPE: cpe:2.3:a:fabian:payroll_management_system:1.0)
Deployments exposing /delete.php to untrusted networks

Discovery Timeline

2025-03-31 - CVE-2025-2984 published to the National Vulnerability Database (NVD)
2025-05-14 - Last updated in NVD database

Technical Details for CVE-2025-2984

Vulnerability Analysis

The vulnerability exists in the employee deletion workflow of the Payroll Management System. The /delete.php endpoint accepts the emp_id argument from an HTTP request and concatenates it directly into a SQL query. Because the application does not use parameterized queries or input validation, attackers can break out of the intended query context and append arbitrary SQL clauses. Successful injection allows reading, modifying, or deleting payroll records, and depending on database privileges, may extend to broader database compromise. The attack is remotely launchable and requires only low-level privileges to reach the vulnerable endpoint.

Root Cause

The root cause is improper neutralization of special characters in the emp_id request parameter before it is included in a downstream SQL statement. The code path lacks prepared statements, type casting, and allow-list validation, leaving the query structure attacker-controllable.

Attack Vector

An attacker sends a crafted HTTP request to /delete.php with a malicious emp_id value containing SQL metacharacters such as single quotes, comment sequences, or UNION clauses. The injected payload alters the query logic executed against the backend database, enabling data exfiltration or unauthorized record manipulation.

No verified proof-of-concept code is published in the referenced advisories. Refer to the GitHub CVE Description and VulDB entry #302036 for additional technical context.

Detection Methods for CVE-2025-2984

Indicators of Compromise

HTTP requests to /delete.php containing SQL metacharacters such as ', --, ;, UNION, or SLEEP( in the emp_id parameter
Web server access logs showing unusually long or URL-encoded emp_id values
Database error messages or 500-series responses returned from /delete.php during reconnaissance
Unexpected DELETE, UPDATE, or SELECT statements in database query logs originating from the payroll application user

Detection Strategies

Inspect web application logs for non-numeric emp_id values, since the parameter should contain only integer identifiers
Deploy a Web Application Firewall (WAF) with SQL injection signatures tuned for PHP applications
Correlate web request anomalies with database audit logs to identify query manipulation
Hunt for outbound data transfers immediately following suspicious /delete.php requests

Monitoring Recommendations

Enable verbose query logging on the MySQL or MariaDB backend serving the payroll application
Alert on repeated HTTP 500 responses or authentication failures preceding /delete.php access
Monitor for unauthorized changes to the employee table outside scheduled administrative windows
Track baseline traffic patterns to /delete.php and flag deviations in request volume or payload size

How to Mitigate CVE-2025-2984

Immediate Actions Required

Restrict network access to the Payroll Management System to trusted administrative networks or VPN users
Disable or remove the /delete.php endpoint until a patched version is deployed
Audit application and database logs for prior exploitation attempts referencing emp_id
Rotate database credentials used by the application if compromise is suspected

Patch Information

No vendor patch has been published in the referenced advisories at the time of NVD listing. Track the code-projects website and the VulDB advisory for remediation updates. Organizations should consider migrating away from the affected version until an official fix is released.

Workarounds

Place the application behind a WAF with rules blocking SQL metacharacters in the emp_id parameter
Apply a virtual patch that enforces integer-only validation on emp_id at the reverse proxy layer
Restrict the database account used by the application to least-privilege, removing DROP and unnecessary DELETE rights
Implement prepared statements in a forked or custom build of /delete.php if source code modification is feasible

bash

# Example NGINX rule to reject non-numeric emp_id values
location = /delete.php {
    if ($arg_emp_id !~ "^[0-9]+$") {
        return 400;
    }
    include fastcgi_params;
    fastcgi_pass unix:/run/php/php-fpm.sock;
}