CVE-2026-72547
Received Received - Intake

Insecure Direct Object Reference in Attendize Allows Bulk Attendee Import

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

Description
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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-72547
EUVD
EUVD-2026-56017

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
attendize attendize *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

An insecure direct object reference vulnerability in Attendize 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, enabling attackers to inject bulk attendee data into any event regardless of account boundaries.

Detection Guidance

To detect this vulnerability, inspect HTTP requests to the postImportAttendee endpoint for any authenticated event organiser attempting to bulk import attendees into events not belonging to their account. Check server logs for unusual attendee import activity across different event IDs. Verify if the endpoint loads events without validating ownership.

Impact Analysis

This vulnerability allows attackers to manipulate attendee data in events they do not own, potentially causing data corruption, unauthorized attendee additions, or disruptions to event management. It could lead to incorrect attendance records, financial discrepancies, or reputational damage for event organizers.

Compliance Impact

This vulnerability could violate data protection regulations like GDPR or HIPAA by allowing unauthorized access and modification of attendee data. It may result in unauthorized disclosure or alteration of personal information, leading to legal penalties, loss of trust, and compliance failures.

Mitigation Strategies

Immediately update Attendize to the latest commit or patch addressing this issue. Implement strict ownership validation for the postImportAttendee endpoint to ensure users can only modify their own events. Review server logs for past exploitation attempts and remove any unauthorized attendee data.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-72547. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart