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Advisories

Hi.Events 1.9.0 - Unauthenticated Attendee PII Exposure via Check-in List short_id

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severity
high
date
Affecting

  • Hi.Events <= 1.9.0

  • An affected version range remains undefined

CWE
  • CWE-359 Exposure of Private Personal Information to an Unauthorized Actor
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
George Chen
Description
Hi.Events through 1.9.0 public check-in list endpoints use short_id as sole access control, allowing unauthenticated access to retrieve full attendee lists including emails and personal information. Attackers with knowledge of the short_id can call GET /api/public/check-in-lists/{short_id}/attendees to read attendee data and create or delete check-in records without authentication.

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