CVE-2026-109393 in QloApps
Summary
by MITRE • 10/12/2026
QloApps through 1.7.0 contains an insecure direct object reference vulnerability in back-office AJAX handlers of AdminOrdersController, AdminBookingDocumentController, AdminProductsController and AdminAddHotelController that skip htl_access hotel checks. Hotel-restricted employees can supply other hotels' sequential identifiers to read, upload and delete booking documents and delete rooms, room images and hotel images.
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Analysis
by VulDB Data Team • 10/12/2026
The vulnerability identified in QloApps versions through 1.7.0 represents a critical failure in access control mechanisms within the application's administrative backend. Specifically, this is an Insecure Direct Object Reference (IDOR) flaw located in several AJAX handlers associated with key management controllers including AdminOrdersController, AdminBookingDocumentController, AdminProductsController, and AdminAddHotelController. The core technical deficiency lies in the absence of proper authorization checks for hotel-specific access permissions. While the application implements a role-based or tenant-isolated security model where employees are restricted to managing resources belonging only to their assigned hotels, these specific AJAX endpoints bypass the htl_access verification logic. This oversight allows any authenticated user with back-office privileges to manipulate objects that do not belong to their designated scope by simply supplying sequential identifiers for other hotels in HTTP requests.
From a technical perspective, the exploitation of this vulnerability relies on the predictable nature of database primary keys or sequential IDs used to identify hotel resources. An attacker can perform horizontal privilege escalation by modifying parameters such as hotel_id or related resource identifiers in AJAX POST or GET requests. Because the server-side logic fails to validate that the requesting user has explicit permission for the target hotel, it proceeds with the requested operation regardless of ownership. This lack of object-level authorization check means that sensitive operations are executed based solely on the presence of a valid session token rather than verifying the relationship between the user's assigned tenant and the resource being accessed.
The operational impact of this vulnerability is severe due to the breadth of actions enabled by these unchecked handlers. Attackers can read, upload, and delete booking documents belonging to other hotels, which compromises customer privacy and business confidentiality. Furthermore, they can delete rooms, room images, and hotel images from competitors or partner establishments within the same platform instance. This capability leads directly to data integrity loss and potential denial of service conditions for affected businesses by removing essential operational assets. The ability to upload arbitrary files also introduces secondary risks such as remote code execution if malicious scripts are uploaded and subsequently executed on the server side, although the primary documented impact focuses on unauthorized deletion and modification of hotel-specific content.
This vulnerability aligns with CWE-639, which categorizes issues related to authorization bypasses through direct object references where access controls are not enforced properly before processing user-supplied input. In terms of offensive security frameworks, this behavior corresponds to the MITRE ATT&CK technique T1078, specifically Valid Accounts and potentially T1530 if data exfiltration is performed via the document upload or read capabilities. The flaw exemplifies a common pattern in web applications where developers assume that session authentication implies sufficient authorization for all actions within an administrative panel without implementing granular checks at each endpoint level.
To mitigate this vulnerability, immediate action must be taken to patch QloApps to version 1.7.1 or later if available, as the vendor has likely addressed these specific handler flaws in subsequent releases. For organizations unable to upgrade immediately, a temporary workaround involves restricting access to the affected administrative URLs through web application firewall rules that block unauthorized AJAX requests lacking proper hotel context validation. Additionally, developers should audit all backend controllers for similar patterns where object identifiers are accepted without verifying ownership against the current user's permissions matrix. Implementing strict server-side authorization checks that validate htl_access rights before executing any database manipulation or file system operation is essential to prevent future instances of this class of vulnerability. Regular security audits and penetration testing focusing on horizontal privilege escalation scenarios should be integrated into the development lifecycle to ensure such gaps do not persist in production environments.