CVE-2025-63738 is an information disclosure vulnerability identified in Xinhu Rainrock RockOA version 2.7.0. The vulnerability arises from improper handling of the 'a' parameter in the index.php file, which allows an attacker to trigger the phpinfo() function. Phpinfo() outputs detailed information about the PHP environment, including configuration settings, loaded modules, environment variables, and server paths. This information can be leveraged by attackers to gain insights into the server setup, identify other vulnerabilities, or craft targeted attacks. The vulnerability does not require authentication, meaning any unauthenticated user with network access to the application can exploit it. No patches or fixes are currently linked to this CVE, and no known exploits have been observed in the wild. The lack of a CVSS score indicates the vulnerability is newly published and not yet fully assessed. The exposure of sensitive server information primarily impacts confidentiality but can indirectly affect integrity and availability if attackers use the information to escalate attacks. The vulnerability scope is limited to installations running the specific vulnerable version of RockOA, a Chinese-origin office automation platform used for enterprise collaboration and management. Given the nature of the vulnerability, exploitation is straightforward, requiring only a crafted HTTP request with the 'a' parameter set to invoke phpinfo().

For European organizations, the primary impact of CVE-2025-63738 is the unauthorized disclosure of sensitive server and application configuration information. This can facilitate further attacks such as privilege escalation, code injection, or lateral movement within the network. Organizations relying on RockOA 2.7.0 for internal office automation and collaboration risk exposing internal infrastructure details to external attackers if the application is accessible from the internet or untrusted networks. The information leakage could also aid attackers in bypassing security controls or identifying weak configurations. While the vulnerability itself does not directly compromise data integrity or availability, it significantly lowers the barrier for subsequent, more damaging attacks. This is particularly concerning for sectors with sensitive or regulated data, such as finance, healthcare, and government agencies. The absence of known exploits in the wild suggests limited immediate risk, but the public disclosure increases the likelihood of future exploitation attempts. European organizations with poor network segmentation or insufficient access controls are at higher risk of exposure.

1. Immediately audit all instances of Xinhu Rainrock RockOA within the organization to identify version 2.7.0 deployments. 2. Restrict external network access to the RockOA application, especially the index.php endpoint, using firewalls, VPNs, or IP whitelisting to limit exposure. 3. Implement web application firewall (WAF) rules to detect and block requests containing the 'a' parameter invoking phpinfo or unexpected query parameters. 4. If possible, modify the application code to disable or remove the phpinfo() call triggered by the 'a' parameter until an official patch is released. 5. Monitor application logs for suspicious requests targeting the 'a' parameter or unusual access patterns. 6. Stay informed about vendor advisories and apply patches or updates promptly once available. 7. Conduct internal penetration testing to verify that no other information disclosure or related vulnerabilities exist. 8. Educate IT and security teams about this vulnerability to ensure rapid response to any exploitation attempts.