CVE-2025-46535 is a Missing Authorization vulnerability (CWE-862) found in the AlphaEfficiencyTeam's Custom Login and Registration product, affecting versions up to 1.0.0. This vulnerability arises due to improperly configured access control mechanisms within the login and registration components, allowing unauthorized users to bypass intended authorization checks. Specifically, the flaw permits attackers to exploit incorrectly set security levels, potentially granting them access to restricted functionalities or sensitive user data without proper credentials or permissions. The vulnerability does not require user interaction or authentication, making it more accessible to remote attackers. Although no known exploits are currently reported in the wild, the nature of the vulnerability suggests a significant risk if weaponized. The absence of a patch at the time of reporting indicates that affected organizations must rely on mitigation strategies until an official fix is released. The vulnerability impacts the confidentiality and integrity of user data and system operations by enabling unauthorized access, but it may not directly affect availability. Given the product's role in authentication workflows, exploitation could lead to privilege escalation, unauthorized account creation, or manipulation of user sessions, undermining the security posture of affected applications.

For European organizations, this vulnerability poses a moderate risk primarily to web applications and services utilizing the AlphaEfficiencyTeam Custom Login and Registration module. Unauthorized access could lead to data breaches involving personal data, which is particularly sensitive under the GDPR framework, potentially resulting in regulatory penalties and reputational damage. The integrity of user authentication processes could be compromised, enabling attackers to impersonate legitimate users or create unauthorized accounts, which may facilitate further attacks such as fraud or lateral movement within networks. While the vulnerability does not inherently disrupt service availability, the downstream effects of unauthorized access could impact operational continuity. Organizations in sectors with stringent compliance requirements, such as finance, healthcare, and government, may face heightened risks due to the sensitivity of the data and systems involved. The lack of known exploits currently reduces immediate risk but does not eliminate the potential for future targeted attacks, especially as threat actors often focus on authentication-related vulnerabilities to gain footholds in enterprise environments.

European organizations should implement the following specific mitigation measures: 1) Conduct an immediate audit of all instances of AlphaEfficiencyTeam Custom Login and Registration to identify affected versions and configurations. 2) Apply strict access control policies at the application layer, ensuring that authorization checks are explicitly enforced for all sensitive operations, even if the underlying product lacks a patch. 3) Employ Web Application Firewalls (WAFs) with custom rules to detect and block anomalous requests that attempt to bypass authorization controls. 4) Monitor authentication and registration logs for unusual patterns indicative of exploitation attempts, such as unexpected account creations or privilege escalations. 5) Isolate or sandbox affected components where feasible to limit potential lateral movement. 6) Engage with the vendor or community for updates and patches, and prepare for rapid deployment once available. 7) Educate development and security teams on secure coding practices related to authorization to prevent similar issues in custom or third-party modules. 8) Consider implementing multi-factor authentication (MFA) to add an additional layer of security that can mitigate unauthorized access even if the authorization flaw is exploited.