CVE-2026-49221 in Vvveb
Summary
by MITRE • 08/18/2026
Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to 1.0.8.4, Vvveb backend digital asset operations allow a low-privileged Vendor to access digital assets linked to another Vendor's products. The admin/controller/product/digital-asset.php and admin/controller/product/digital-assets.php controllers and the admin/sql/sqlite/digital_asset.sql data queries use a caller-controlled digital_asset_id without consistently enforcing the current admin_id ownership boundary. An attacker can list assets, read asset names and file metadata, edit asset metadata, or delete asset records, which can disclose private product metadata, corrupt resource links, and cause data loss. This issue is fixed in version 1.0.8.4.
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Analysis
by VulDB Data Team • 08/18/2026
Vvveb CMS versions prior to 1.0.8.4 contain a critical Insecure Direct Object Reference vulnerability that compromises the isolation of digital assets within multi-vendor environments. The system, designed for building websites and ecommerce stores with page builder capabilities, relies on specific backend controllers to manage file operations associated with vendor products. Specifically, the admin/controller/product/digital-asset.php and admin/controller/product/digital-assets.php scripts handle requests related to these files. Additionally, the underlying database interactions defined in admin/sql/sqlite/digital_asset.sql execute queries that retrieve or modify asset records based on identifiers provided by the client side of the application.
The core technical flaw lies in the failure to enforce ownership boundaries when processing digital asset operations. The controllers accept a caller-controlled parameter representing the digital_asset_id without sufficiently validating whether this ID belongs to an entity owned by the currently authenticated administrator. In a multi-vendor architecture, different vendors operate under distinct administrative accounts that should have strict access controls limiting them to their own resources. However, because the application logic does not consistently cross-reference the provided asset identifier against the current admin_id associated with the active session, any low-privileged Vendor user can manipulate identifiers belonging to other vendors. This lack of server-side authorization checks allows an attacker to bypass intended security boundaries simply by altering request parameters.
The operational impact of this vulnerability is significant for data integrity and confidentiality within ecommerce platforms. An authenticated attacker with vendor-level privileges can enumerate digital assets linked to competing or unrelated vendors, effectively listing files that should remain private. Beyond mere enumeration, the attacker can read sensitive asset names and file metadata, which may expose proprietary product information or internal system details. Furthermore, the ability to edit asset metadata allows for resource link corruption, potentially disrupting workflows or misleading other users about file contents. Most critically, the capability to delete asset records leads to irreversible data loss, destroying critical media files associated with products and degrading the functionality of the ecommerce store.
This vulnerability aligns with CWE-639, which describes Authorization Bypass Through User-Controlled Key, as well as CWE-284, indicating Improper Access Control. From a threat modeling perspective using the MITRE ATT&CK framework, this behavior corresponds to techniques involving unauthorized access to resources and potential data exfiltration through indirect object references. The flaw represents a classic case where input validation is performed on the format of identifiers but not on their semantic relationship to the user's permissions.
To mitigate this risk, organizations running Vvveb CMS must upgrade immediately to version 1.0.8.4 or later, which implements proper ownership checks for all digital asset operations. For environments that cannot yet patch, implementing a reverse proxy with strict access control lists can provide an additional layer of defense by restricting direct access to backend controller endpoints based on IP addresses and authentication tokens rather than relying solely on application-level logic. Developers should also audit other areas of the codebase where user-supplied identifiers are used in database queries without corresponding ownership validation against session data, ensuring that all resource accesses are explicitly authorized relative to the current user's role and assigned entities.