CVE-2025-34119 is a critical remote file disclosure vulnerability affecting Tinasoft EasyCafe Server version 2.2.14. The EasyCafe Server listens on TCP port 831 for a custom protocol that includes an opcode 0x43, which can be exploited by unauthenticated remote attackers to request arbitrary files on the server by specifying their absolute path. If the requested file exists and is accessible by the server process, its contents are returned to the attacker without any authentication or authorization checks. This vulnerability stems from improper access control and exposure of resources to an incorrect security sphere (CWE-668), combined with a lack of authentication (CWE-306). The flaw allows attackers to retrieve sensitive information such as system configuration files, password files, or application data, potentially leading to further compromise or data leakage. The vulnerability has a CVSS 4.0 base score of 8.8 (high severity), reflecting its ease of exploitation (no authentication or user interaction required), network attack vector, and high impact on confidentiality. No patches or mitigations have been officially released at the time of publication, and no known exploits are currently observed in the wild, although the vulnerability is straightforward to exploit given network access to the service port.

For European organizations using Tinasoft EasyCafe Server 2.2.14, this vulnerability poses a significant risk to confidentiality and potentially integrity of sensitive data. EasyCafe Server is typically used in internet cafes, libraries, and public access environments to manage client sessions and billing. Exposure of configuration files or password stores could allow attackers to escalate privileges, pivot within internal networks, or exfiltrate sensitive customer or organizational data. Since the vulnerability requires no authentication and can be exploited remotely, attackers can target exposed EasyCafe servers directly from the internet or internal networks. This could lead to data breaches, regulatory non-compliance (e.g., GDPR violations due to unauthorized data disclosure), reputational damage, and operational disruption. The impact is especially critical in environments where EasyCafe servers are connected to broader organizational networks or contain sensitive user data. Given the lack of patches, organizations face an urgent need to implement compensating controls to prevent exploitation.

1. Immediate network-level mitigation: Restrict access to TCP port 831 using firewalls or network segmentation to allow only trusted management hosts to communicate with the EasyCafe Server. 2. Disable or block the custom protocol opcode 0x43 if configurable, or disable the EasyCafe Server service if not in active use. 3. Monitor network traffic for unusual requests to port 831, especially those containing opcode 0x43, to detect potential exploitation attempts. 4. Conduct an inventory of all EasyCafe Server instances and upgrade to a patched version once available from Tinasoft. 5. If patching is not immediately possible, consider deploying application-layer proxies or intrusion prevention systems that can detect and block arbitrary file read attempts. 6. Review and harden file system permissions to limit the EasyCafe Server process access to only necessary files, minimizing the impact of arbitrary file reads. 7. Educate IT and security teams about this vulnerability to ensure rapid response and incident handling if exploitation is detected.