CVE-2025-63691 affects pig-mesh, a system management tool, specifically versions 3.8.2 and below. The vulnerability resides in the Token Management function's token query interface (/api/admin/sys-token/page), which lacks proper permission verification. Although the interface requires user authentication, it does not restrict access to authorized roles, allowing any logged-in user to retrieve plaintext authentication tokens for all active sessions. These tokens include those of administrator accounts, enabling attackers to impersonate admins and gain full system management privileges. The flaw effectively bypasses role-based access control by exposing sensitive authentication credentials. Exploiting this vulnerability requires only valid user credentials, which could be obtained through phishing or other means. Once exploited, attackers can take over the system, manipulate configurations, and potentially disrupt operations or exfiltrate data. No public exploits are known yet, and no official patches have been released as of the publication date. The vulnerability was reserved on October 27, 2025, and published on November 7, 2025, indicating recent discovery. The absence of a CVSS score necessitates an independent severity assessment based on the impact and exploitability characteristics.

For European organizations, this vulnerability poses a significant risk to confidentiality, integrity, and availability of critical systems managed by pig-mesh. Unauthorized access to administrator tokens can lead to full system compromise, allowing attackers to alter configurations, disable security controls, or deploy malicious payloads. This could disrupt business operations, cause data breaches, and damage organizational reputation. Sectors such as finance, healthcare, government, and critical infrastructure that rely on pig-mesh for system management are particularly vulnerable. The ease of exploitation—requiring only authenticated user access—lowers the barrier for insider threats or attackers who have compromised low-privilege accounts. The potential for lateral movement and privilege escalation within networks increases the overall threat landscape. Additionally, the lack of public exploits currently provides a window for proactive defense, but also means organizations must act swiftly to prevent future exploitation. The impact is amplified in environments with weak user authentication or insufficient network segmentation.

Organizations should immediately audit access controls on the /api/admin/sys-token/page endpoint and restrict it strictly to authorized administrative roles. Implement network-level segmentation and firewall rules to limit access to system management interfaces. Enforce strong authentication mechanisms, such as multi-factor authentication (MFA), to reduce the risk of credential compromise. Monitor logs for unusual access patterns to the token query interface and investigate any anomalous token retrieval attempts. Until an official patch is released, consider disabling or restricting the Token Management function if feasible. Conduct thorough user access reviews to minimize the number of users with login privileges. Educate users about phishing and credential security to prevent initial account compromise. Prepare incident response plans to quickly address potential exploitation. Stay informed about vendor updates and apply patches promptly once available. Employ endpoint detection and response (EDR) tools to detect suspicious activity related to token misuse or privilege escalation.