CVE-2026-26883: Men's Salon Management System SQLi Flaw

CVE-2026-26883 Overview

Sourcecodester Online Men's Salon Management System v1.0 contains a SQL Injection vulnerability in the /msms/classes/Master.php file, specifically in the f=delete_appointment functionality. This web application vulnerability allows attackers with administrative privileges to manipulate database queries through improper input validation, potentially enabling unauthorized access to sensitive data stored in the application's database.

Critical Impact

Authenticated attackers with high privileges can exploit this SQL Injection flaw to extract confidential information from the database, including customer records, appointment details, and potentially administrator credentials.

Affected Products

• Oretnom23 Simple Online Men's Salon Management System v1.0
• Applications using /msms/classes/Master.php with the delete_appointment function

Discovery Timeline

• 2026-03-03 - CVE-2026-26883 published to NVD
• 2026-03-04 - Last updated in NVD database

Technical Details for CVE-2026-26883

Vulnerability Analysis

This SQL Injection vulnerability exists in the appointment deletion functionality of the Online Men's Salon Management System. The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), which indicates that user-supplied input is being directly incorporated into SQL queries without proper sanitization or parameterization.

While the vulnerability requires high-privilege (administrator) access to exploit and is limited to read-only data exposure with no integrity or availability impact, it still poses a confidentiality risk to the application's data. The network-accessible nature of the vulnerability means it can be exploited remotely without user interaction once an attacker has obtained administrative credentials.

Root Cause

The root cause of this vulnerability lies in the improper handling of user input in the Master.php file. The delete_appointment function fails to properly sanitize or parameterize the input parameters before constructing SQL queries. This allows specially crafted input to break out of the intended query structure and execute arbitrary SQL commands, enabling data extraction from the underlying database.

Attack Vector

The attack vector is network-based, targeting the /msms/classes/Master.php?f=delete_appointment endpoint. An authenticated attacker with administrative privileges can inject malicious SQL statements through the vulnerable parameter. By manipulating the appointment deletion request, the attacker can modify the underlying SQL query to perform unauthorized data retrieval operations.

The vulnerability mechanism involves injecting SQL syntax into the request parameters that are passed to the delete_appointment function. When the application processes this request without proper input validation, the injected SQL code is executed by the database engine. For detailed technical analysis and proof-of-concept information, refer to the GitHub SQL Injection Report.

Detection Methods for CVE-2026-26883

Indicators of Compromise

• Unusual SQL error messages in application logs related to the Master.php file
• Abnormal database query patterns originating from the delete_appointment function
• HTTP requests to /msms/classes/Master.php?f=delete_appointment containing SQL syntax characters such as single quotes, double dashes, or UNION statements
• Unexpected data access patterns in database audit logs

Detection Strategies

• Implement web application firewall (WAF) rules to detect SQL injection patterns targeting the /msms/classes/Master.php endpoint
• Monitor application logs for SQL syntax errors or unusual query execution times
• Deploy database activity monitoring to detect anomalous query patterns from the web application
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging on the web server for all requests to PHP endpoints
• Configure database query logging to capture and analyze executed SQL statements
• Set up alerts for HTTP requests containing common SQL injection payloads targeting the application
• Regularly review access logs for the /msms/classes/ directory for suspicious activity

How to Mitigate CVE-2026-26883

Immediate Actions Required

• Restrict access to the administrative functions of the Online Men's Salon Management System to trusted IP addresses only
• Implement strong authentication controls and review administrative user accounts for compromise
• Consider disabling the vulnerable delete_appointment functionality until a patch is available
• Deploy a web application firewall with SQL injection protection rules

Patch Information

No official vendor patch is currently available for this vulnerability. Organizations using this software should monitor the vendor's repository for security updates. In the absence of an official fix, consider implementing the code-level mitigations described in the workarounds section or replacing the software with a more secure alternative.

Workarounds

• Modify the Master.php file to use prepared statements with parameterized queries for all database operations
• Implement input validation to reject requests containing SQL metacharacters
• Add additional authentication layers before the vulnerable endpoint
• Use application-level access controls to limit who can invoke the delete_appointment function

# Example: Restrict access to Master.php via Apache configuration
<Files "Master.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    # Allow only from trusted internal network
</Files>