CVE-2025-8512 is a medium-severity vulnerability identified in version 2.9.0 of the TVB Big Big Shop App on Android. The root cause lies in improper exportation of Android application components due to incorrect processing of the AndroidManifest.xml file within the app's package, specifically in the component hk.com.tvb.bigbigshop. In Android applications, components such as activities, services, broadcast receivers, and content providers can be exported to allow interaction with other apps or system components. Improperly exported components can expose sensitive functionality or data to unauthorized local applications or users. This vulnerability requires local access to the device, meaning an attacker must have some level of access to the Android device where the app is installed. The CVSS 4.0 vector indicates the attack vector is local (AV:L), with low attack complexity (AC:L), no privileges required (PR:L, meaning limited privileges), no user interaction (UI:N), and low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). The exploit has been publicly disclosed, but no known exploits are currently observed in the wild. The vendor was notified early but has not responded or issued a patch, increasing the risk for users. The vulnerability could allow a local attacker or malicious app to interact with exported components that should not be accessible, potentially leading to unauthorized data access or manipulation within the app's context. However, the impact is limited by the requirement for local access and the low severity of the vulnerability. This issue highlights the importance of correctly configuring component export settings in AndroidManifest.xml to prevent unintended exposure of app components.

For European organizations, the impact of this vulnerability depends largely on the usage of the TVB Big Big Shop App within their environment. Since the app is an Android application likely targeted at consumers or specific user groups, the direct impact on enterprise systems may be limited unless the app is used on corporate devices. However, if employees or users within an organization use this app on devices that also access corporate resources, a local attacker or malicious app could exploit this vulnerability to gain unauthorized access to app components, potentially leading to data leakage or manipulation of app behavior. This could indirectly affect organizational security if sensitive information is stored or processed by the app or if the app is used as a vector to pivot to other attacks on the device. The requirement for local access reduces the risk of remote exploitation but does not eliminate the threat from insider attacks or malware already present on devices. The lack of vendor response and patch availability increases the window of exposure. Organizations in sectors with high mobile device usage or those that manage Android devices should be aware of this vulnerability and consider it in their mobile device management and security policies.

1. Immediate mitigation involves restricting physical and local access to devices running the vulnerable app to trusted users only. 2. Organizations should monitor devices for the presence of the TVB Big Big Shop App version 2.9.0 and consider uninstalling or disabling it if not essential. 3. Employ mobile device management (MDM) solutions to enforce application whitelisting and restrict installation of untrusted or unnecessary apps. 4. Use Android security features such as app sandboxing and permission management to limit the ability of other apps to interact with the vulnerable app's components. 5. Educate users about the risks of installing apps from untrusted sources and the importance of device security hygiene. 6. Monitor for updates from the vendor or community patches and apply them promptly once available. 7. Conduct regular security assessments of mobile devices to detect signs of compromise or exploitation attempts. 8. If feasible, perform static or dynamic analysis of the app to identify and block attempts to exploit the improperly exported components at the network or device level.