CVE-2026-85156 in AVideo
Summary
by MITRE • 09/03/2026
WWBN AVideo fails to properly validate access controls on the public channel page, allowing unauthenticated visitors to view unlisted and group-restricted videos through hardcoded visibility flags and an undefined property. Attackers can access the channel endpoint to retrieve sensitive video content that should be hidden, including full URLs to unlisted videos and thumbnails of member-only content, regardless of the operator's hidePrivateVideos setting.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 09/03/2026
The vulnerability identified in WWBN AVideo represents a critical failure in access control mechanisms within the public-facing channel interface. This flaw allows unauthenticated users to bypass intended privacy restrictions by exploiting hardcoded visibility flags and an undefined property in the application logic. Specifically, the system fails to properly validate whether a requesting user has the necessary permissions before serving content associated with private or group-restricted channels. By manipulating requests to specific endpoints, attackers can retrieve sensitive video metadata that is explicitly designed to remain hidden from public view. This includes full URLs for unlisted videos and thumbnails belonging to member-only content, effectively rendering privacy settings such as hidePrivateVideos ineffective against this specific attack vector.
From a technical perspective, the root cause lies in how the application handles visibility parameters during request processing. The software relies on hardcoded flags that do not dynamically check user authentication status or group membership for certain channel endpoints. Additionally, an undefined property appears to be utilized in a manner that bypasses standard security checks, allowing data leakage regardless of the administrator's configured privacy preferences. This indicates a fundamental misunderstanding of secure coding practices regarding object-level access control, where resources are accessed based on their inherent properties rather than the context of the user requesting them. The lack of proper validation means that any individual with network connectivity to the server can enumerate and retrieve these restricted assets without providing valid credentials or session tokens.
The operational impact of this vulnerability is significant for organizations relying on AVideo for secure content distribution, particularly in educational, corporate, or subscription-based environments. Unauthorized access to unlisted videos compromises confidentiality by exposing proprietary training materials, internal communications, or premium content intended only for specific audiences. The exposure of full URLs facilitates further attacks, such as direct linking abuse, bandwidth theft, or the aggregation of sensitive data across multiple channels. Furthermore, the visibility of thumbnails from member-only sections can reveal strategic information about upcoming releases or private events to competitors or malicious actors. This breach undermines trust in the platform's ability to protect intellectual property and maintain user privacy expectations.
This vulnerability aligns with CWE-284 Improper Access Control, as it involves a failure to restrict access to resources based on user identity or privileges. It also maps to MITRE ATT&CK technique T1078 Valid Accounts if the attacker leverages stolen credentials for broader access, though in this specific case, it primarily reflects T1530 Data from Cloud Storage Objects due to the exfiltration of data stored within the application's cloud-like structure. To mitigate this risk, developers must enforce strict server-side validation on all endpoints serving sensitive content. Access control checks should be implemented at a central authorization layer rather than relying on individual endpoint logic or hardcoded flags. Regular security audits and penetration testing focusing on broken access control patterns are essential to identify similar flaws in other parts of the application stack before they can be exploited by adversaries seeking unauthorized data exposure.