CVE-2025-0606 is an authorization bypass vulnerability classified under CWE-639 (Authorization Bypass Through User-Controlled Key) affecting Logo Software Inc.'s Logo Cloud product versions before 0.67. The vulnerability arises because the application improperly validates user-controlled keys used to access resources, allowing attackers with some level of privileges (PR:H) to perform forceful browsing and access resources beyond their authorization scope. This can lead to unauthorized disclosure of sensitive information (high confidentiality impact), limited integrity impact due to potential unauthorized data exposure or partial modification, and limited availability impact through resource leak exposure. The vulnerability is exploitable remotely over the network (AV:N) with low attack complexity (AC:L), no user interaction (UI:N), and unchanged scope (S:U). Although exploitation requires privileges, the bypass allows attackers to escalate access within the application. No known exploits are currently reported in the wild, and no patches are listed yet, indicating the need for proactive mitigation. The vulnerability's root cause is insufficient validation of user-supplied keys controlling resource access, enabling attackers to bypass authorization checks and access unauthorized resources.

For European organizations using Logo Cloud, this vulnerability poses a significant risk to the confidentiality of sensitive business data due to unauthorized resource access. The integrity of data may be partially affected if attackers can manipulate accessible resources, and availability could be impacted if resource leak exposure leads to system instability or denial of service. Organizations in sectors with strict data protection requirements, such as finance, healthcare, and government, are particularly vulnerable to compliance violations and reputational damage. Since exploitation requires some level of privileges, insider threats or compromised accounts could leverage this vulnerability to escalate access. The network-exploitable nature increases the attack surface, especially for organizations exposing Logo Cloud services externally or within large internal networks. The absence of patches and known exploits necessitates urgent attention to prevent potential exploitation as threat actors may develop exploits in the future.

1. Monitor Logo Software Inc. communications closely for official patches or updates addressing CVE-2025-0606 and apply them promptly once available. 2. Implement strict access control validation on all user-supplied keys or parameters controlling resource access within Logo Cloud, including server-side validation and authorization checks. 3. Restrict privileges to the minimum necessary for users to reduce the risk of privilege abuse, employing role-based access control (RBAC) and regular privilege audits. 4. Conduct thorough logging and monitoring of resource access patterns to detect forceful browsing attempts or unusual access to sensitive resources. 5. Employ network segmentation and firewall rules to limit access to Logo Cloud services only to trusted internal networks or VPN users. 6. Educate administrators and users about the risks of privilege escalation and enforce strong authentication mechanisms to reduce account compromise risk. 7. If feasible, perform penetration testing or vulnerability assessments focusing on authorization controls within Logo Cloud to identify and remediate similar weaknesses proactively.