CVE-2025-5893 is a critical vulnerability affecting version 1.0 of the Smart Parking Management System developed by Honding Technology. This vulnerability is categorized under CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere) and CWE-256 (Plaintext Storage of a Password). The flaw allows unauthenticated remote attackers to access a specific web page within the system that exposes administrator credentials in plaintext. Because no authentication or user interaction is required, an attacker can remotely retrieve highly sensitive information, including administrator usernames and passwords, without any prior access or privileges. The vulnerability has a CVSS v3.1 base score of 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. The exposure of administrator credentials compromises the entire system's security posture, enabling attackers to gain full administrative control. This can lead to unauthorized manipulation of parking management operations, data theft, disruption of services, and potential pivoting to other connected infrastructure. The vulnerability is present in the initial release (version 1.0) of the product, and no patches or mitigations have been published yet. Although no known exploits are currently reported in the wild, the ease of exploitation and the critical nature of the flaw make it a significant threat. The vulnerability highlights poor credential management and insecure information disclosure practices within the affected system.

For European organizations deploying the Honding Technology Smart Parking Management System, this vulnerability poses a severe risk. Exposure of administrator credentials can lead to full compromise of parking infrastructure, which is often integrated with city traffic management, payment processing, and public safety systems. Unauthorized access could disrupt parking availability, cause financial losses due to manipulation of payment data, and undermine public trust in smart city technologies. Additionally, attackers could leverage compromised credentials to move laterally within municipal or corporate networks, potentially accessing other critical systems. Given the increasing adoption of smart parking solutions in European urban centers to improve traffic flow and environmental goals, the impact extends beyond operational disruption to potential safety hazards and privacy violations. The critical severity and remote, unauthenticated exploitability mean that any organization using this system without immediate mitigation is at high risk of attack, especially as no patches are currently available.

Immediate mitigation steps should include isolating the affected Smart Parking Management System from external networks to prevent remote exploitation. Network segmentation and strict firewall rules should be applied to limit access to the management interface only to trusted internal IP addresses. Organizations should conduct thorough audits to identify any unauthorized access attempts and change all administrator credentials once the vulnerability is addressed. Employing multi-factor authentication (MFA) for administrative access, if supported, can reduce risk. Monitoring network traffic for unusual access patterns to the vulnerable page is recommended. Since no official patches are available, organizations should engage with Honding Technology for timelines on fixes and consider temporary compensating controls such as web application firewalls (WAFs) to block access to the exposed page. Long term, organizations should evaluate the security posture of smart city vendors and require secure credential storage and information disclosure practices as part of procurement policies.