CVE-2026-2058: CloudClassroom-PHP SQLi Vulnerability

CVE-2026-2058 Overview

A SQL injection vulnerability has been identified in the mathurvishal CloudClassroom-PHP-Project, affecting the /postquerypublic.php file within the Post Query Details Page component. The vulnerability stems from improper handling of the gnamex parameter, allowing attackers to inject malicious SQL statements. This flaw can be exploited remotely without authentication, potentially compromising database integrity, confidentiality, and availability.

Critical Impact
Unauthenticated attackers can remotely exploit this SQL injection vulnerability to access, modify, or delete sensitive database information in affected CloudClassroom-PHP-Project deployments.

Affected Products

mathurvishal CloudClassroom-PHP-Project (up to commit 5dadec098bfbbf3300d60c3494db3fb95b66e7be)
CloudClassroom-PHP-Project installations using rolling release versions

Discovery Timeline

2026-02-06 - CVE-2026-2058 published to NVD
2026-02-06 - Last updated in NVD database

Technical Details for CVE-2026-2058

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) affects the Post Query Details Page functionality within CloudClassroom-PHP-Project. The vulnerable endpoint /postquerypublic.php fails to properly sanitize user-supplied input in the gnamex parameter before incorporating it into SQL queries.

The attack can be executed remotely over the network and requires no authentication or user interaction. Successful exploitation allows attackers to manipulate database queries, potentially leading to unauthorized data access, data modification, or data deletion. The vulnerability has a published exploit available, increasing the risk of active exploitation in the wild.

The vendor was contacted about this disclosure but did not respond, and the product uses a rolling release strategy, making it difficult to identify specific affected or patched versions.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization of the gnamex argument in the /postquerypublic.php file. The application directly incorporates user-controlled input into SQL queries without using parameterized queries or proper escaping mechanisms, allowing attackers to inject arbitrary SQL code.

Attack Vector

The attack vector is network-based, requiring no special privileges or user interaction. An attacker can craft malicious HTTP requests to the /postquerypublic.php endpoint, injecting SQL payloads through the gnamex parameter. This allows the attacker to:

Extract sensitive data from the database (e.g., user credentials, personal information)
Modify or delete existing database records
Potentially escalate privileges within the application
Bypass authentication mechanisms

The vulnerability can be exploited through standard web request manipulation using tools like Burp Suite, curl, or custom scripts. For detailed technical information about the exploitation method, refer to the GitHub PoC Repository and impact analysis.

Detection Methods for CVE-2026-2058

Indicators of Compromise

Unusual or malformed requests to /postquerypublic.php containing SQL syntax characters (e.g., single quotes, UNION statements, comment markers)
Database error messages in application logs indicating SQL syntax errors
Unexpected database queries or data access patterns from the web application
Evidence of data exfiltration or unauthorized data modifications in database audit logs

Detection Strategies

Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in the gnamex parameter
Monitor HTTP access logs for requests to /postquerypublic.php containing suspicious payloads
Implement database activity monitoring to detect anomalous query patterns
Use intrusion detection systems (IDS) with SQL injection signature rules

Monitoring Recommendations

Enable verbose logging for the CloudClassroom-PHP-Project application to capture request parameters
Configure database query logging to track all queries originating from the web application
Set up alerts for database errors indicating potential SQL injection attempts
Monitor network traffic for data exfiltration patterns following potential exploitation

How to Mitigate CVE-2026-2058

Immediate Actions Required

Restrict access to /postquerypublic.php using network-level controls or web server configuration
Deploy a Web Application Firewall (WAF) with SQL injection protection rules in front of the application
Review database permissions and apply the principle of least privilege to the application's database user
Consider taking the affected endpoint offline until a patch is available

Patch Information

The vendor (mathurvishal) was contacted regarding this vulnerability but did not respond. Due to the project's rolling release strategy, specific version information for patched releases is not available. Users should monitor the project repository for updates. Additional vulnerability details are available at VulDB #344618.

Workarounds

Implement input validation at the application level to sanitize the gnamex parameter before processing
Use prepared statements with parameterized queries for all database interactions involving user input
Deploy a reverse proxy with request filtering to block requests containing SQL injection patterns
Consider migrating to an alternative learning management system if the vendor remains unresponsive

bash

# Example Apache configuration to restrict access to the vulnerable endpoint
<Location "/postquerypublic.php">
    # Deny access from all hosts
    Require all denied
    
    # Or restrict to trusted IP ranges only
    # Require ip 10.0.0.0/8 192.168.0.0/16
</Location>