CVE-2025-68164 is a vulnerability classified under CWE-203 (Information Exposure Through Discrepancy) affecting JetBrains TeamCity, a popular continuous integration and build management system. The flaw exists in versions prior to 2025.11 and allows authenticated users with high privileges to enumerate network ports via the Perforce connection test functionality. This means that when a user tests the connection to a Perforce server within TeamCity, the system inadvertently reveals information about open or closed ports, which can be leveraged to map network configurations. The vulnerability requires authentication with elevated privileges (PR:H) but does not require user interaction beyond that. The CVSS v3.1 base score is 2.7, indicating low severity, with an attack vector of network (AV:N), low attack complexity (AC:L), and no impact on integrity or availability, only limited confidentiality impact (C:L). No known exploits have been reported in the wild, and no official patches have been linked yet. This vulnerability primarily aids attackers in reconnaissance phases by providing network topology insights that could be used to plan further attacks or lateral movement within an environment.

For European organizations, the impact of CVE-2025-68164 is primarily limited to information disclosure. While the vulnerability does not directly compromise data integrity or system availability, it can facilitate attackers or malicious insiders in gathering network configuration details, specifically port states related to Perforce servers integrated with TeamCity. This reconnaissance capability could assist in crafting more targeted attacks or exploiting other vulnerabilities. Organizations heavily reliant on TeamCity for CI/CD pipelines and using Perforce as their version control system are at higher risk. The exposure of port information could lead to increased risk of lateral movement or unauthorized access if combined with other vulnerabilities or misconfigurations. However, since exploitation requires authenticated high-privilege access, the threat is mitigated by strong access controls. The low CVSS score reflects the limited scope and impact of this vulnerability, but it remains a concern for organizations with sensitive development environments or strict compliance requirements.

To mitigate CVE-2025-68164, European organizations should implement the following specific measures: 1) Restrict high-privilege access to TeamCity, ensuring only trusted administrators can perform Perforce connection tests. 2) Monitor and audit usage of the Perforce connection test feature to detect unusual or unauthorized activity. 3) Apply the latest TeamCity updates and patches once JetBrains releases a fix addressing this vulnerability. 4) Consider network segmentation to isolate build servers and version control systems, limiting exposure of port information. 5) Employ strong authentication mechanisms such as multi-factor authentication (MFA) for TeamCity administrative accounts. 6) Review and harden Perforce server configurations to minimize unnecessary open ports and services. 7) Educate development and operations teams about the risks of information disclosure and the importance of adhering to least privilege principles. These targeted actions go beyond generic advice by focusing on controlling access to the vulnerable feature and limiting the potential reconnaissance benefits an attacker could gain.