CVE-2026-49222 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 product question operations allow a low-privileged Vendor to manage questions under another Vendor's products. The admin/sql/sqlite/product_question.sql queries accept a caller-controlled product_question_id and do not verify product_question.product_id against product.admin_id for the current admin_id. An attacker can read pending question content and moderation data, change question status, edit question content, or delete questions, manipulating product Q&A visibility and integrity. This issue is fixed in version 1.0.8.4.
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Analysis
by VulDB Data Team • 08/18/2026
The vulnerability identified in Vvveb CMS prior to version 1.0.8.4 represents a critical failure in access control mechanisms within the backend administrative interface, specifically affecting product question management operations. As an open-source content management system designed for building websites and ecommerce stores, Vvveb relies on robust permission checks to ensure that users can only interact with resources they are authorized to manage. In this specific instance, the flaw resides in the SQL query logic used to handle product questions, where the application fails to enforce proper ownership verification between the authenticated user's administrative privileges and the resource being accessed. This architectural oversight allows a low-privileged Vendor account to perform actions on products belonging to other vendors, fundamentally breaking the isolation expected in multi-vendor ecommerce environments.
From a technical perspective, the root cause is located in the product_question.sql module which processes requests containing a caller-controlled product_question_id parameter. The application retrieves data based solely on this identifier without subsequently validating whether the associated product's administrative owner matches the current session's admin_id. This lack of server-side authorization check means that any authenticated user with vendor-level access can iterate through or guess valid question identifiers to manipulate records outside their scope. By bypassing these checks, an attacker can read sensitive pending questions and moderation data, alter the status of existing questions, modify content, or delete entries entirely. Such capabilities compromise both the confidentiality and integrity of product-related communications, allowing malicious actors to disrupt customer interactions or expose proprietary information intended for specific vendor-customer dialogues.
The operational impact of this vulnerability is significant for ecommerce platforms utilizing Vvveb CMS in a multi-vendor capacity. Unauthorized access to question data can lead to the leakage of confidential business strategies embedded within pending inquiries, such as pricing negotiations or supply chain details shared by customers before public posting. Furthermore, the ability to delete or modify questions undermines trust between vendors and their customer base, potentially damaging brand reputation and leading to financial loss due to lost sales or increased support overhead required to resolve disputes arising from tampered communications. The manipulation of moderation data also poses a risk where inappropriate content could be left visible or legitimate inquiries suppressed at will by an attacker with minimal privileges.
This vulnerability aligns closely with CWE-269, which describes Improper Privilege Control, as it involves a user exploiting insufficiently enforced permissions to access resources beyond their intended scope. Additionally, the exploitation technique corresponds to ATT&CK tactic T1078, specifically Valid Accounts, where an attacker uses legitimate credentials to gain unauthorized access to system functions and data. The failure to verify resource ownership against user identity is a classic example of insecure direct object references in action, highlighting the necessity for strict authorization checks on all backend operations involving shared resources.
To mitigate this vulnerability, administrators must upgrade Vvveb CMS to version 1.0.8.4 or later, where these access control flaws have been addressed by implementing proper validation logic that ensures product_question.product_id is correctly matched against the current admin's authorized products before executing any queries. In addition to patching, it is advisable to implement comprehensive logging for administrative actions related to question management to detect potential enumeration attempts or unauthorized modifications in real-time. Security teams should also review other backend endpoints for similar patterns of insufficient authorization checks, ensuring that all resource-specific operations validate both the user's role and their ownership relationship with the target data object before granting access.