CVE-2025-7907 is a medium-severity vulnerability affecting yangzongzhuan RuoYi versions up to 4.8.1. The vulnerability arises from the use of default credentials within the configuration file ruoyi-admin/src/main/resources/application-druid.yml, specifically related to the Druid component. Druid is a database connection pool and monitoring tool commonly integrated into Java-based applications. The presence of default credentials means that an attacker can remotely access the system without needing to guess or brute-force passwords, as the credentials are preset and likely well-known or easily discoverable. This vulnerability does not require user interaction or privileges beyond network access, and it can be exploited remotely over the network. The CVSS 4.0 vector indicates no privileges or user interaction are required, and the attack complexity is low. The impact primarily concerns confidentiality, as unauthorized access to the database connection pool could allow an attacker to extract sensitive data or manipulate database queries. Integrity and availability impacts are rated low or none, as the vulnerability does not directly enable data modification or denial of service. Although no known exploits are currently observed in the wild, the public disclosure of the exploit increases the risk of exploitation. The vulnerability is classified as problematic due to the security risk posed by default credentials, which are a common and preventable security misconfiguration.

For European organizations using yangzongzhuan RuoYi versions 4.8.0 or 4.8.1, this vulnerability could lead to unauthorized remote access to backend database connections, potentially exposing sensitive business data, customer information, or intellectual property. This is particularly critical for sectors handling personal data under GDPR, such as finance, healthcare, and public administration. Unauthorized access could result in data breaches, regulatory fines, reputational damage, and operational disruptions. Since the vulnerability allows remote exploitation without authentication, attackers could leverage it for lateral movement within networks or as a foothold for further attacks. The medium severity rating suggests that while the vulnerability is serious, it may not directly lead to full system compromise or widespread disruption without additional vulnerabilities or misconfigurations. However, given the increasing regulatory scrutiny and data protection requirements in Europe, even medium-severity vulnerabilities can have significant legal and financial consequences.

European organizations should immediately audit their deployments of yangzongzhuan RuoYi to identify affected versions (4.8.0 and 4.8.1). Specific mitigation steps include: 1) Changing default credentials in the application-druid.yml configuration file to strong, unique passwords that follow best practices for complexity and length. 2) Restricting network access to the Druid management interfaces and database connection pools using firewalls or network segmentation to limit exposure to trusted hosts only. 3) Monitoring logs and network traffic for unusual access patterns or unauthorized connection attempts targeting the Druid component. 4) Applying any available patches or updates from the vendor as soon as they are released, even though no patch links are currently provided. 5) Implementing multi-factor authentication and role-based access controls where possible to reduce the risk of credential misuse. 6) Conducting regular security assessments and configuration reviews to detect and remediate similar misconfigurations proactively. These measures go beyond generic advice by focusing on configuration hygiene, network controls, and monitoring specific to the vulnerable component.