CVE-2025-15225 is a vulnerability identified in Sunnet's WMPro product, specifically version 5.0, involving a relative path traversal flaw (CWE-23) that enables unauthenticated remote attackers to read arbitrary files on the affected system. The vulnerability arises because WMPro fails to properly sanitize or validate user-supplied file path inputs, allowing attackers to manipulate file paths to access files outside the intended directories. This arbitrary file read capability can expose sensitive configuration files, credentials, or other critical system data, compromising confidentiality. The vulnerability is remotely exploitable without any authentication or user interaction, increasing the risk profile. The CVSS v4.0 score of 8.7 reflects the high impact on confidentiality and the ease of exploitation. No patches or fixes are currently linked, and no known exploits have been reported in the wild, but the vulnerability's nature suggests it could be weaponized quickly. The lack of required privileges or user interaction means attackers can scan and exploit vulnerable systems en masse. The vulnerability does not affect integrity or availability directly but can serve as a stepping stone for further attacks. The vulnerability was published on December 29, 2025, and assigned by TW-CERT, indicating recognition by a national cybersecurity authority.

For European organizations, this vulnerability poses a significant risk of sensitive data exposure, including internal configuration files, credentials, or proprietary information stored on systems running WMPro 5.0. The arbitrary file read can lead to information disclosure that may facilitate further attacks such as privilege escalation, lateral movement, or targeted espionage. Sectors such as finance, government, healthcare, and critical infrastructure that rely on WMPro for workflow or document management are particularly vulnerable. The unauthenticated nature of the exploit means attackers can remotely scan and exploit systems without prior access, increasing the attack surface. Data privacy regulations like GDPR heighten the consequences of such breaches, potentially resulting in legal and financial penalties. Additionally, the exposure of system files could undermine trust in affected organizations and disrupt business operations if sensitive information is leaked or manipulated.

1. Immediate monitoring for any unusual file access patterns or unauthorized requests targeting WMPro systems. 2. Implement strict input validation and sanitization on all file path parameters within WMPro to prevent path traversal attempts. 3. Restrict file system permissions for the WMPro application user to the minimum necessary, preventing access to sensitive directories and files. 4. Deploy network-level protections such as web application firewalls (WAFs) configured to detect and block path traversal payloads. 5. Conduct comprehensive vulnerability scanning across all WMPro instances to identify unpatched or vulnerable versions. 6. Coordinate with Sunnet for official patches or updates and apply them promptly once released. 7. Segment WMPro servers from critical internal networks to limit lateral movement in case of compromise. 8. Educate IT and security teams about the vulnerability specifics to enhance detection and response capabilities. 9. Maintain up-to-date backups of critical data to mitigate potential secondary impacts from exploitation.