CVE-2025-30031: SQL Injection Vulnerability in TeleControl Server Basic

Overview

In this post, we will delve into an SQL injection vulnerability tagged as CVE-2025-30031 that has been found in all versions of TeleControl Server Basic preceding V3.1.2.2. This vulnerability can potentially compromise the system and cause data leakage, as it allows an authenticated remote attacker to bypass authorization controls. Given the widespread use of the application in question, the vulnerability is a matter of concern for a large number of users, making its understanding and mitigation of utmost importance.

Vulnerability Summary

CVE ID: CVE-2025-30031
Severity: High (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: Bypass authorization controls, read and write to the application’s database, execute code with “NT AUTHORITY\NetworkService” permissions.

Affected Products

Product | Affected Versions

TeleControl Server Basic | All versions < V3.1.2.2 How the Exploit Works

The vulnerability stems from the application’s ‘UpdateUsers’ method, which fails to properly sanitize user-supplied input. An attacker, who has authenticated access to the system, can exploit this flaw by injecting malicious SQL queries. This injection can be executed through port 8000, which the application uses. Once the SQL query is inserted, the attacker can bypass authorization controls and manipulate the application’s database, potentially leading to data leakage or system compromise.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This is a simplified representation and actual exploitation would require a more sophisticated approach.

POST /UpdateUsers HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"user_id": "1; DROP TABLE users;"
}

In the above example, the malicious payload attempts to drop the ‘users’ table from the database, a destructive action that would cause significant disruption.

Mitigation Guidance

To mitigate this vulnerability, users are recommended to apply the vendor patch that upgrades the system to version V3.1.2.2 or later. Users unable to immediately apply the patch can use Web Application Firewalls (WAFs) or Intrusion Detection Systems (IDS) as a temporary measure to detect and block malicious SQL injection attempts. Regularly updating and patching your software remains the best proactive measure to protect your systems from such vulnerabilities.