CVE-2026-0699: Intern Management System SQLi Vulnerability

CVE-2026-0699 Overview

A SQL Injection vulnerability has been identified in code-projects Intern Membership Management System version 1.0. The vulnerability exists in the /intern/admin/edit_activity.php file, where the activity_id parameter is not properly sanitized before being used in SQL queries. This allows attackers to inject malicious SQL commands and potentially compromise the underlying database.

Critical Impact

Remote attackers with administrative privileges can exploit this SQL injection vulnerability to extract sensitive data, modify database contents, or potentially escalate their access within the application.

Affected Products

• code-projects Intern Membership Management System 1.0
• /intern/admin/edit_activity.php endpoint

Discovery Timeline

• 2026-01-08 - CVE-2026-0699 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2026-0699

Vulnerability Analysis

This SQL Injection vulnerability (classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs when user-supplied input through the activity_id parameter is directly incorporated into SQL queries without proper validation or parameterization. The vulnerability is remotely exploitable over the network and requires high-privilege (administrative) access to reach the vulnerable endpoint.

The attack requires no user interaction and can be performed with low complexity. While the immediate impact on confidentiality, integrity, and availability is limited to the vulnerable system itself, successful exploitation could lead to unauthorized data access, modification of activity records, or disruption of the membership management functionality.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries or prepared statements in the edit_activity.php file. The activity_id parameter is directly concatenated into SQL query strings, allowing attackers to break out of the intended query structure and inject arbitrary SQL commands.

Attack Vector

The vulnerability is exploitable via network-based attacks targeting the administrative interface of the Intern Membership Management System. An attacker with administrative access can craft malicious requests to the /intern/admin/edit_activity.php endpoint, manipulating the activity_id parameter to include SQL injection payloads.

The vulnerability allows for classic SQL injection techniques including UNION-based injection for data extraction, blind SQL injection for inferring database contents, and potentially stacked queries depending on the database configuration. The exploit has been publicly disclosed, increasing the risk of widespread exploitation.

Technical details and proof-of-concept information are available in the GitHub SQL Injection Report.

Detection Methods for CVE-2026-0699

Indicators of Compromise

• Unusual SQL error messages in application logs originating from edit_activity.php
• HTTP requests to /intern/admin/edit_activity.php containing SQL syntax characters such as single quotes, double dashes, or UNION statements in the activity_id parameter
• Database query logs showing unexpected SELECT, INSERT, UPDATE, or DELETE operations not associated with normal application behavior
• Evidence of time-based delays in responses suggesting blind SQL injection attempts

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the activity_id parameter
• Monitor HTTP access logs for requests containing SQL metacharacters or injection signatures targeting the vulnerable endpoint
• Enable database query logging and alert on queries containing suspicious patterns or unexpected data extraction operations
• Deploy application-layer intrusion detection to identify anomalous request patterns to administrative endpoints

Monitoring Recommendations

• Enable verbose logging for all requests to the /intern/admin/ directory
• Configure SIEM rules to correlate authentication events with subsequent requests to vulnerable endpoints
• Monitor database performance for unusual query execution times that may indicate time-based blind injection attacks
• Implement anomaly detection for administrative user behavior patterns

How to Mitigate CVE-2026-0699

Immediate Actions Required

• Restrict network access to the administrative interface using firewall rules or VPN requirements
• Implement additional authentication controls for the vulnerable endpoint
• Consider temporarily disabling the edit_activity.php functionality until a patch is applied
• Review and audit administrative user accounts to ensure only authorized personnel have access

Patch Information

No official vendor patch has been identified for this vulnerability at this time. Organizations using code-projects Intern Membership Management System should monitor the Code Projects Resource Hub for security updates. Additional vulnerability intelligence is available through VulDB #339976.

Workarounds

• Implement input validation to ensure activity_id contains only numeric values before processing
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules in front of the application
• Use database user accounts with minimal required privileges to limit the impact of successful SQL injection
• Consider implementing prepared statements or parameterized queries at the application level as a code-level fix

# Example: Apache ModSecurity rule to block SQL injection attempts
SecRule ARGS:activity_id "!@rx ^[0-9]+$" \
    "id:1001,phase:2,deny,status:403,log,msg:'SQL Injection attempt blocked in activity_id parameter'"