CVE-2026-0850: Intern Membership System SQLi Vulnerability

CVE-2026-0850 Overview

A SQL injection vulnerability has been identified in code-projects Intern Membership Management System version 1.0. The vulnerability affects the /admin/delete_activity.php file, where improper handling of the activity_id parameter allows attackers to inject malicious SQL statements. This flaw enables remote attackers to manipulate database queries, potentially leading to unauthorized data access, modification, or deletion.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to compromise database integrity, extract sensitive information, or modify application data through manipulated activity_id parameter values.

Affected Products

• code-projects Intern Membership Management System 1.0

Discovery Timeline

• January 11, 2026 - CVE-2026-0850 published to NVD
• January 13, 2026 - Last updated in NVD database

Technical Details for CVE-2026-0850

Vulnerability Analysis

This SQL injection vulnerability (classified as CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs in the administrative interface of the Intern Membership Management System. The vulnerable endpoint /admin/delete_activity.php accepts an activity_id parameter that is insufficiently sanitized before being incorporated into database queries.

The exploit has been publicly disclosed and is available for use, increasing the risk profile of unpatched installations. The vulnerability is remotely exploitable over the network, though it requires high-privilege access to the administrative interface, which provides some mitigation against widespread exploitation.

Root Cause

The root cause of this vulnerability is the failure to properly validate and sanitize user-supplied input in the activity_id parameter before using it in SQL queries. The application likely constructs database queries using string concatenation or inadequate parameterization, allowing an attacker to break out of the intended query structure and inject arbitrary SQL commands.

Attack Vector

The attack vector for CVE-2026-0850 is network-based, requiring the attacker to have authenticated access to the administrative panel. An attacker with admin credentials can craft malicious HTTP requests to /admin/delete_activity.php with specially crafted activity_id values containing SQL injection payloads.

The vulnerability can be exploited by manipulating the activity_id parameter to include SQL metacharacters and commands. For example, an attacker could append SQL statements that extract data from other database tables, modify existing records, or delete critical information. The publicly disclosed exploit demonstrates practical exploitation techniques for this vulnerability. Technical details can be found in the GitHub CVE Document.

Detection Methods for CVE-2026-0850

Indicators of Compromise

• Unusual or malformed requests to /admin/delete_activity.php containing SQL keywords such as UNION, SELECT, DROP, or comment sequences like -- or /*
• Database errors or exceptions logged in application logs related to the activity_id parameter
• Unexpected database query patterns or anomalous data access in database audit logs
• Evidence of data exfiltration or unauthorized database modifications

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to administrative endpoints
• Enable detailed logging for the /admin/delete_activity.php endpoint and monitor for suspicious parameter values
• Deploy database activity monitoring to identify anomalous query patterns or unauthorized data access
• Use intrusion detection systems (IDS) with SQL injection signatures targeting the affected parameter

Monitoring Recommendations

• Monitor HTTP access logs for requests to /admin/delete_activity.php with unusual activity_id parameter lengths or encoded characters
• Set up alerts for database error messages that may indicate SQL injection attempts
• Review authentication logs for any unauthorized access to administrative functions

How to Mitigate CVE-2026-0850

Immediate Actions Required

• Restrict access to the /admin/delete_activity.php endpoint to only trusted IP addresses until a patch is available
• Implement input validation on the activity_id parameter to accept only numeric values
• Deploy a Web Application Firewall with SQL injection protection enabled
• Audit database accounts used by the application and apply the principle of least privilege

Patch Information

As of the last update on January 13, 2026, no official patch has been released by code-projects. System administrators should monitor the Code Projects Resource Hub for security updates. Additional vulnerability details are available through VulDB #340445.

Workarounds

• Implement server-side input validation to ensure activity_id contains only integer values before processing
• Use prepared statements or parameterized queries in the application code to prevent SQL injection
• Deploy network-level access controls to limit administrative interface access to trusted networks
• Consider temporarily disabling the delete activity functionality until proper input sanitization can be implemented

# Example Apache configuration to restrict admin access
<Location /admin/delete_activity.php>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Location>