CVE-2025-66744 identifies a path traversal vulnerability in Yonyou YonBIP version 3 and earlier, specifically within the LoginWithV8 interface of the series data application service system. Path traversal (CWE-22) vulnerabilities occur when an application improperly sanitizes user-supplied input used to construct file paths, allowing attackers to access files outside the intended directory. In this case, the vulnerability enables unauthenticated remote attackers to manipulate file path parameters to retrieve sensitive system information without authorization. The vulnerability is exploitable over the network without requiring any privileges or user interaction, increasing its risk profile. The CVSS v3.1 base score is 7.5, reflecting high severity due to the high impact on confidentiality (full disclosure of sensitive data), no impact on integrity or availability, and low attack complexity. No patches are currently linked, indicating that organizations must monitor vendor advisories closely. Although no known exploits have been reported in the wild, the vulnerability's characteristics make it a prime target for attackers seeking to gain unauthorized access to internal data. The LoginWithV8 interface is a critical component of the YonBIP platform, widely used in enterprise environments for business process management and data services, making this vulnerability particularly concerning for organizations relying on this software.

For European organizations, the primary impact of CVE-2025-66744 is the unauthorized disclosure of sensitive information, which could include configuration files, user data, or internal system details. This breach of confidentiality can lead to further attacks such as credential theft, privilege escalation, or targeted intrusion campaigns. Organizations in regulated industries such as finance, healthcare, and government may face compliance violations and reputational damage if sensitive data is exposed. The vulnerability's ease of exploitation and lack of required authentication increase the risk of widespread exploitation, especially in environments where YonBIP is exposed to external networks. Additionally, the exposure of internal information could facilitate lateral movement within networks, amplifying the potential damage. The absence of known exploits currently provides a window for proactive mitigation, but the threat landscape could evolve rapidly once exploit code becomes available.

1. Monitor official Yonyou security advisories and apply patches or updates as soon as they are released to address this vulnerability. 2. Implement strict input validation and sanitization on all user-supplied parameters, particularly those involving file paths, to prevent path traversal attempts. 3. Deploy Web Application Firewalls (WAFs) configured to detect and block path traversal attack patterns targeting the LoginWithV8 interface. 4. Restrict network exposure of the YonBIP application to trusted internal networks or VPNs to reduce the attack surface. 5. Conduct regular security assessments and penetration testing focusing on path traversal and related vulnerabilities. 6. Employ robust logging and monitoring to detect unusual access patterns or attempts to access unauthorized files. 7. Segment critical systems and sensitive data repositories to limit the impact of potential breaches. 8. Educate development and operations teams on secure coding practices and the risks associated with improper input handling.