In the ever-evolving landscape of cybersecurity, XML External Entity (XXE) vulnerabilities have emerged as a significant concern. These flaws occur when an XML parser processes input containing references to external entities, potentially leading to unauthorized access to sensitive data. A notable instance is CVE-2025-30220, identified in GeoServer, GeoTools, and GeoNetwork platforms. This vulnerability arises from the GeoTools Schema class's use of the Eclipse XSD library, which is susceptible to XXE exploits. Attackers can inject malicious XML code, leading to the disclosure of internal files, denial of service, and potential remote code execution. The vulnerability has been assigned a CVSS score of 9.9, indicating its high severity. ameeba.com
Another critical example is CVE-2025-2775, affecting SysAid On-Premise versions up to 23.3.40. This XXE flaw allows unauthenticated attackers to execute arbitrary commands on the affected system. By embedding an external directive, an attacker can force the SysAid server to fetch remote resources, read arbitrary files on the host OS, and exfiltrate credentials. When combined with a command-injection vulnerability, it can lead to remote code execution. The flaw is rated CVSS 9.3 (Critical) and maps to CWE-611: Improper Restriction of XML External Entity Reference. ionix.io