CVE-2025-27446 is a vulnerability classified under CWE-732 (Incorrect Permission Assignment for Critical Resource) affecting the Apache APISIX Java Plugin Runner component from versions 0.2.0 through 0.5.0. The root cause is improper file permission settings on local listening files used by the plugin runner, which are critical resources. These files are accessible with permissions that allow a local attacker with limited privileges to manipulate or replace them, thereby escalating their privileges on the host system. The vulnerability does not require user interaction but does require local access with low privileges. Exploitation could lead to full compromise of the affected system, impacting confidentiality, integrity, and availability. The vulnerability was publicly disclosed on July 6, 2025, with a CVSS v3.1 base score of 7.8, indicating high severity. The Apache Software Foundation has addressed the issue in version 0.6.0 of the Java Plugin Runner. This component is typically used in cloud-native environments that leverage Apache APISIX for API gateway and microservices management, making the vulnerability relevant to modern distributed application infrastructures.

The vulnerability allows a local attacker to escalate privileges by exploiting incorrect permission settings on critical files, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, modification or disruption of service, and the ability to execute arbitrary code with elevated privileges. For organizations, this could mean data breaches, service outages, and loss of trust. Since Apache APISIX is widely used in cloud-native and microservices architectures, the impact can extend to critical business applications and infrastructure. The requirement for local access limits remote exploitation but does not eliminate risk, especially in environments where multiple users or containers share the same host. The vulnerability affects confidentiality, integrity, and availability, making it a significant threat to organizations relying on affected versions.

1. Upgrade Apache APISIX Java Plugin Runner to version 0.6.0 or later immediately to apply the official fix. 2. Restrict local access to systems running the affected versions to trusted users only, minimizing the risk of local exploitation. 3. Implement strict file system permissions and regularly audit permissions on critical files related to the plugin runner to ensure they are not overly permissive. 4. Use containerization or sandboxing to isolate the plugin runner process and reduce the impact of potential privilege escalation. 5. Monitor system logs and file integrity for signs of unauthorized access or modification. 6. Employ host-based intrusion detection systems (HIDS) to detect suspicious local activities. 7. Educate system administrators and developers about the risks of incorrect permission assignments and secure configuration best practices.