How to Fix CVE-2025-0929: Critical SQL Injection Vulnerability in TeamCal Neo Affecting Database Security?

A critical SQL injection vulnerability, identified as CVE-2025-0929, has been discovered in TeamCal Neo, a popular online calendar application used to manage work team events and absences. This flaw could allow a remote, unauthenticated attacker to execute arbitrary SQL commands, potentially leading to the complete compromise of the application's database. This article aims to provide security professionals with the necessary information and guidance to understand, detect, and remediate this critical vulnerability. We'll delve into the technical details of the flaw, its impact, and, most importantly, how to protect your systems from exploitation.

A Short Introduction to TeamCal Neo

TeamCal Neo is a web-based calendar application designed to streamline the management of team events and absences. It allows organizations to track employee availability, schedule meetings, and coordinate team activities. Its ease of use and online accessibility make it a valuable tool for many teams. The application is used by many different organizations of all sizes, making it a potential target for malicious actors. Understanding the application's functionality is vital for securing it effectively.

Summary of the Vulnerability

This vulnerability arises from the improper handling of user-supplied input in the abs parameter within the /teamcal/src/index.php file of TeamCal Neo. Specifically, the application fails to properly sanitize or validate this parameter before using it in an SQL query. Consequently, an attacker can inject malicious SQL code into the parameter, which is then executed by the database server. This could enable the attacker to read, modify, or delete all of the data in the underlying database, ultimately gaining full control over the affected system. The vulnerability is rated as critical because it's easily exploitable, requires no user interaction, and has a high impact on confidentiality, integrity, and availability.

Impact of the Vulnerability

The impact of the CVE-2025-0929 vulnerability is significant due to the nature of the flaw and the high CVSS score of 9.8. An attacker exploiting this SQL injection flaw can gain complete control over the TeamCal Neo database. The potential consequences include:

The low attack complexity, along with the network-based attack vector, further exacerbates the severity of this issue. Because no authentication is required, any remote attacker can attempt to exploit this vulnerability with relative ease. This makes it paramount for organizations using affected versions of TeamCal Neo to address the vulnerability immediately.

Products Affected by the Vulnerability

The following table summarizes the products affected by CVE-2025-0929.

As of the latest information available, only TeamCal Neo version 3.8.2 has been identified as vulnerable to CVE-2025-0929. No other versions are explicitly mentioned as being affected, but it is always good practice to stay vigilant, and regularly check for any updates on the products you are using. Organizations utilizing this specific version should prioritize remediation efforts to mitigate the risks.

How to Check If Your Product is Vulnerable?

Identifying if your TeamCal Neo instance is vulnerable to CVE-2025-0929 is crucial for assessing and mitigating your risk. Here are some methods you can use to check for the vulnerability:

1. Version Verification: The most straightforward method is to check the version of your TeamCal Neo installation.

2. Manual Vulnerability Check: To confirm the SQL injection vulnerability:

3. Web Application Firewall (WAF) Logs: If you have a WAF in place, inspect its logs for unusual activity related to the abs parameter in /teamcal/src/index.php. Look for requests containing SQL keywords (like SELECT, UNION, OR, AND, etc.) within the parameter. This can indicate an ongoing or previous attempt to exploit this vulnerability.

4. Security Scanners: Use security scanners that can test for vulnerabilities in web applications. These tools may have specific checks for this SQL injection vulnerability and can provide automated assessments. Ensure that your scanning tools have the latest vulnerability database updates.

It is also advised to regularly monitor the logs for any unusual requests containing SQL keywords or any anomalous access patterns. Early detection can be crucial for minimizing the impact of any potential attacks.

How to Fix the Vulnerability?

Currently, there is no officially released patch for CVE-2025-0929, as the most recent information available indicates the vulnerability affects TeamCal Neo version 3.8.2 with no fixed versions mentioned. However, this should not prevent you from taking immediate actions to mitigate the risk. Here’s a set of remediation steps to protect against the vulnerability:

1. Immediate Mitigation: Since a patch is not currently available, the following measures are recommended:

2. Web Application Firewall (WAF): Configure your WAF to filter out malicious requests that target the vulnerable abs parameter in /teamcal/src/index.php. Create custom rules to detect and block requests that include SQL keywords or other malicious patterns.

3. Monitor and Audit Database Activities: Set up monitoring and auditing tools to keep track of database activities and identify any suspicious behavior. By monitoring database operations, you can quickly detect and respond to any potential SQL injection attempts, which will enable you to take reactive actions.

4. Restrict Access: If immediate patching is not possible, temporarily restrict access to the vulnerable component. You can achieve this by implementing access controls that limit access based on IP addresses or authentication requirements, or completely restrict access to the affected component.

5. Stay Informed: Monitor official channels and sources for security updates and patches related to this vulnerability, including the vendor's website and security advisories. Apply any patches or updates as soon as they are available.

6. Temporary Disable or Restrict Access: If immediate patching or workarounds are not possible, consider temporarily disabling or restricting access to the affected component to prevent exploitation. This is a measure of last resort while you implement the needed changes.

By adopting these measures, security professionals can proactively manage the risks associated with the CVE-2025-0929 vulnerability. This proactive approach can significantly reduce the likelihood of exploitation and protect your systems until a permanent patch is available. You may need to use Web Application Firewall to mitigate this.

This article aims to assist security professionals in understanding, detecting, and remediating the CVE-2025-0929 SQL injection vulnerability in TeamCal Neo. By taking the outlined actions, organizations can significantly reduce the risks associated with this critical flaw and protect their valuable data. Stay vigilant, and always prioritize security when developing or using web applications. Knowing about security misconfiguration is also important. It is also important to understand supply chain attacks. If you want to know more about authentication bypass you can check out this article. For Security information and event management you can check this article.

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