CVE-2025-65482 is a critical security vulnerability classified as an XML External Entity (XXE) attack within the opensagres XDocReport library, versions 0.9.2 to 2.0.3. XDocReport is a Java-based tool used for generating reports and documents, often processing .docx files that contain XML data. The vulnerability arises from improper parsing of XML content embedded in uploaded .docx files, allowing attackers to inject malicious XML entities. When the vulnerable library processes these crafted files, it can lead to arbitrary code execution on the host system without requiring authentication or user interaction. The CVSS 3.1 base score of 9.8 reflects the high impact on confidentiality, integrity, and availability, combined with network attack vector, low attack complexity, and no privileges or user interaction needed. Although no public exploits are currently known, the severity and ease of exploitation make this a critical threat. The root cause is linked to CWE-611, which involves insecure XML external entity references that can be exploited to read sensitive files, cause denial of service, or execute code. This vulnerability is particularly dangerous in environments where XDocReport is integrated into automated document processing pipelines, exposing backend systems to remote compromise.

For European organizations, the impact of CVE-2025-65482 is substantial. Exploitation can lead to full system compromise, data breaches, and disruption of critical document processing services. Sectors such as finance, healthcare, legal, and government, which rely heavily on automated document generation and processing, face heightened risks. Confidential information could be exfiltrated, integrity of generated documents compromised, and availability of services disrupted, potentially leading to regulatory non-compliance and reputational damage. The vulnerability’s network accessibility and lack of required privileges mean attackers can exploit it remotely and anonymously, increasing the threat landscape. Additionally, organizations using XDocReport in cloud or hybrid environments may face broader exposure. The absence of known public exploits currently provides a window for proactive mitigation, but the critical severity demands urgent attention.

To mitigate CVE-2025-65482, organizations should immediately audit their use of opensagres XDocReport and identify affected versions (0.9.2 to 2.0.3). Although no official patches are currently listed, organizations should monitor vendor advisories for updates and apply patches promptly once available. In the interim, disable XML external entity processing in the XML parsers used by XDocReport by configuring parser features such as 'disallow-doctype-decl' and 'external-general-entities' to false. Implement strict input validation and sanitization on all uploaded .docx files to detect and block malicious XML content. Employ network-level protections such as web application firewalls (WAFs) with custom rules to detect and block suspicious payloads targeting document upload endpoints. Conduct thorough logging and monitoring of document processing activities to detect anomalies. Where feasible, isolate document processing services in segmented environments with minimal privileges to limit potential damage. Educate developers and administrators about secure XML handling practices to prevent similar vulnerabilities.