CVE-2026-72546 in Attendize
Summary
by MITRE • 08/11/2026
An insecure direct object reference vulnerability in Attendize through commit 9289acb allows any authenticated event organiser to inject attendees and orders into events belonging to other accounts via the postInviteAttendee endpoint. The endpoint loads the target event by ID without scoping the query to the authenticated organiser account. An attacker can modify event data and financial records across account boundaries.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability represents a critical insecure direct object reference flaw that fundamentally undermines access control mechanisms within the Attendize platform. The issue manifests specifically through the postInviteAttendee endpoint where the application fails to implement proper authorization checks before processing requests. When an authenticated event organizer makes a request to this endpoint, the system retrieves the target event solely based on the provided event ID parameter without verifying whether the requesting user has legitimate ownership or permission rights over that particular event. This design flaw creates a direct pathway for privilege escalation and unauthorized data manipulation across different user accounts.
The technical implementation of this vulnerability stems from inadequate input validation and access control enforcement within the application's backend logic. The system processes event ID parameters without performing account scoping operations that would normally ensure users can only interact with resources belonging to their own account. This pattern aligns with CWE-284 which categorizes insecure direct object references as a weakness where applications grant unauthorized access to objects through manipulation of identifiers such as database keys or file paths. The vulnerability is particularly dangerous because it operates at the application level where business logic controls are bypassed entirely, allowing attackers to leverage their authenticated session to perform actions that should be restricted by account ownership.
The operational impact of this vulnerability extends far beyond simple data access violations and creates substantial financial and reputational risks for both platform administrators and end users. Attackers can exploit this flaw to inject fraudulent attendees into events owned by other organizers, potentially leading to revenue manipulation through unauthorized order creation and processing. The ability to modify financial records across account boundaries represents a severe compromise of the platform's integrity, as it enables attackers to alter event registration data, payment information, and attendee lists without detection. This vulnerability directly violates the principle of least privilege and creates opportunities for fraudulent activities that could result in significant monetary losses and legal complications.
Security mitigation strategies must address both immediate remediation requirements and long-term architectural improvements to prevent similar vulnerabilities from reoccurring. The primary fix involves implementing proper access control checks that verify user ownership before processing any event-related operations through the postInviteAttendee endpoint. This requires modifications to the backend logic to ensure all requests are scoped to the authenticated user's account, typically by joining user and event tables or applying account-specific filters to database queries. Organizations should also implement comprehensive logging and monitoring of access patterns to detect suspicious activities that might indicate exploitation attempts. The remediation approach aligns with ATT&CK technique T1078 which addresses legitimate credentials and valid accounts as a means of gaining access, emphasizing the need for proper authorization controls even when users are authenticated. Additional defensive measures include implementing rate limiting on event-related endpoints and conducting regular security assessments to identify potential privilege escalation vectors within the application's authorization framework.
This vulnerability demonstrates how seemingly simple architectural oversights can create substantial security risks in web applications. The lack of account scoping in database queries represents a common pattern that has been documented across numerous applications, making it essential for development teams to implement robust access control mechanisms from the initial design phase. Organizations should also consider implementing automated security testing tools that can identify direct object reference vulnerabilities during the development lifecycle, preventing these issues from reaching production environments where they could be exploited by malicious actors. The incident highlights the critical importance of thorough code reviews focusing on authorization logic and proper input validation practices that ensure all user interactions are properly constrained to appropriate access boundaries.