CVE-2025-49989 is a Missing Authorization vulnerability (CWE-862) found in the App Cheap App Builder product, affecting versions up to 5.5.3. This vulnerability arises due to incorrectly configured access control security levels, allowing unauthorized users to perform actions or access resources that should be restricted. Specifically, the flaw is in the authorization mechanism, which fails to properly verify whether a user has the necessary permissions before granting access to certain functionalities or data within the application builder platform. The CVSS 3.1 base score is 5.3 (medium severity), with the vector indicating that the vulnerability is exploitable remotely over the network (AV:N), requires low attack complexity (AC:L), does not require privileges (PR:N), and no user interaction (UI:N). The impact is limited to a low confidentiality impact (C:L), with no impact on integrity (I:N) or availability (A:N). No known exploits are currently in the wild, and no patches have been published yet. The vulnerability was publicly disclosed on June 20, 2025, and was reserved on June 11, 2025. The issue affects the App Cheap App Builder, a platform used to create applications, which may be deployed in various organizational environments. The missing authorization could allow attackers to access or manipulate application components or data that should be restricted, potentially leading to information disclosure or unauthorized configuration changes, but not to data modification or service disruption directly.

For European organizations using App Cheap App Builder, this vulnerability could lead to unauthorized access to sensitive application components or data during the app development or deployment process. While the direct impact on integrity and availability is not indicated, the confidentiality breach could expose proprietary business logic, customer data, or internal configurations. This could result in competitive disadvantage, regulatory compliance issues (especially under GDPR if personal data is involved), and reputational damage. Since the vulnerability does not require authentication or user interaction and can be exploited remotely, it poses a risk especially to organizations with publicly accessible instances of the App Builder or those with weak network segmentation. The medium severity rating suggests that while the risk is not critical, it should not be ignored, particularly in sectors with high data sensitivity such as finance, healthcare, and government. The lack of known exploits currently reduces immediate risk, but the presence of a known vulnerability without a patch increases the window of opportunity for attackers to develop exploits.

1. Implement strict network access controls to restrict access to the App Cheap App Builder interface to trusted internal networks or VPN users only, minimizing exposure to the internet. 2. Conduct a thorough review of all access control configurations within the App Builder environment to identify and remediate any improperly configured permissions or roles. 3. Monitor application logs and access patterns for unusual or unauthorized access attempts, focusing on actions that should require authorization. 4. If possible, deploy Web Application Firewalls (WAFs) with custom rules to detect and block unauthorized access attempts targeting the App Builder. 5. Engage with the vendor (App Cheap) for timely updates or patches and apply them promptly once available. 6. Consider isolating the App Builder environment from production systems to limit potential lateral movement in case of exploitation. 7. Educate developers and administrators on secure configuration practices and the importance of enforcing authorization checks. 8. As a temporary measure, disable or restrict features known to be vulnerable if feasible until a patch is released.