Overview
The Common Vulnerabilities and Exposures (CVE) system has identified a high-severity vulnerability in all versions of TeleControl Server Basic prior to V3.1.2.2. This vulnerability, identified as CVE-2025-31349, exposes the application to SQL injection attacks via the ‘UpdateSmtpSettings’ method. As SQL injection is a well-known and commonly exploited vulnerability, this revelation puts countless systems and data at risk, especially those that are networked and rely on the affected software.
If successfully exploited, this vulnerability allows an authenticated remote attacker to bypass authorization controls, manipulate the application’s database, and even execute code with “NT AUTHORITYNetworkService” permissions. Therefore, it is crucial for all users and administrators of TeleControl Server Basic to take immediate action to mitigate this vulnerability.
Vulnerability Summary
CVE ID: CVE-2025-31349
Severity: High (CVSS: 8.8)
Attack Vector: Network (port 8000)
Privileges Required: User (authenticated)
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
No phone number, email, or personal info required.
Product | Affected Versions
TeleControl Server Basic | All versions < V3.1.2.2 How the Exploit Works
An attacker, after gaining user-level access to the system, can target the ‘UpdateSmtpSettings’ method of the TeleControl Server Basic application. By embedding malicious SQL code into the input data for this method, the attacker can manipulate the application’s database. This could allow the attacker to read sensitive data, modify or delete data, or even execute arbitrary code with “NT AUTHORITY\NetworkService” permissions. This level of access can lead to a full compromise of the system.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This pseudocode demonstrates a POST request with a malicious SQL payload.
POST /UpdateSmtpSettings HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "smtp_server": "'; DROP TABLE users; --" }In the above example, the attacker is exploiting the ‘UpdateSmtpSettings’ method by sending a malicious payload that would delete the ‘users’ table from the database.
Mitigation Guidance
To mitigate the risk of this vulnerability, users of TeleControl Server Basic should immediately upgrade to version V3.1.2.2 or later, which contains a patch for this flaw. As a temporary measure, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used to filter out SQL injection attempts. However, this is not a permanent solution and upgrading the software is strongly advised.