CVE-2026-72547
HighCVSS 7.1Summary
An insecure direct object reference vulnerability in Attendize through commit 9289acb allows any authenticated event organiser to bulk import attendees into events belonging to other accounts via the postImportAttendee endpoint. The endpoint loads the target event by ID without verifying ownership against the requesting organiser account. An attacker can inject bulk attendee data into any event in the system regardless of account boundaries.
Risk Assessment
The risk includes integrity breach of event data and potential manipulation of attendee data, which can lead to false registrations and operational disruption. It may also undermine trust in the system.
Recommendation
It is recommended to immediately apply patches or add event ownership verification in the postImportAttendee endpoint. Also conduct an audit of existing data.
Original NVD description (English source)
An insecure direct object reference vulnerability in Attendize through commit 9289acb allows any authenticated event organiser to bulk import attendees into events belonging to other accounts via the postImportAttendee endpoint. The endpoint loads the target event by ID without verifying ownership against the requesting organiser account. An attacker can inject bulk attendee data into any event in the system regardless of account boundaries.