CVE-2025-11695 is a vulnerability classified under CWE-295 (Improper Certificate Validation) affecting MongoDB Rust Driver versions prior to 3.2.5. The issue arises when the connection string includes the parameter tlsInsecure=False, which paradoxically disables TLS certificate validation instead of enforcing it. This misconfiguration allows an attacker positioned on the network path to intercept and manipulate the TLS handshake, effectively enabling man-in-the-middle (MITM) attacks. The vulnerability impacts the confidentiality and integrity of data exchanged between the client application and MongoDB servers. The CVSS 3.1 score is 8.0 (high), reflecting network attack vector, high impact on confidentiality and integrity, no privileges required, and user interaction needed. The scope is changed (S:C), indicating that the vulnerability can affect resources beyond the vulnerable component. No known exploits have been reported yet, but the risk is significant due to the widespread use of MongoDB and the increasing adoption of Rust in backend services. The vulnerability is particularly dangerous because developers might mistakenly believe that setting tlsInsecure=False enforces security, while it actually disables certificate validation. This can lead to silent interception and data compromise without triggering alarms. The vulnerability was published on October 13, 2025, and no official patches or mitigations beyond upgrading to version 3.2.5 have been documented at the time of reporting.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of sensitive data transmitted to MongoDB databases when using the Rust Driver with the vulnerable versions and configuration. Sectors such as finance, healthcare, government, and critical infrastructure that rely on secure database connections could face data breaches, unauthorized data manipulation, or espionage. The vulnerability could enable attackers to intercept authentication tokens, query data, or inject malicious commands if the TLS connection is compromised. Given the high adoption of MongoDB in Europe and the growing use of Rust for backend services, the attack surface is considerable. Additionally, the vulnerability could undermine compliance with GDPR and other data protection regulations due to potential unauthorized data exposure. The lack of known exploits in the wild suggests the threat is emerging, but the ease of network-based exploitation and the severity of impact warrant immediate attention.

European organizations should immediately audit their MongoDB Rust Driver usage to identify versions prior to 3.2.5 and check for the presence of tlsInsecure=False in connection strings. The primary mitigation is to upgrade the MongoDB Rust Driver to version 3.2.5 or later, where proper certificate validation is enforced. Avoid using the tlsInsecure=False parameter altogether, as it disables critical security checks. Implement network-level protections such as TLS interception detection, strict firewall rules, and network segmentation to reduce the risk of MITM attacks. Employ certificate pinning or mutual TLS authentication where feasible to strengthen trust validation. Conduct security awareness training for developers to understand the implications of TLS configuration parameters. Monitor network traffic for anomalies indicative of MITM attempts. Finally, integrate vulnerability scanning and dependency management tools to detect and remediate usage of vulnerable driver versions proactively.