CVE-2026-57960CWE-359

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

High · published June 29, 2026

CVSS v4.0
8.3
EPSS
0%
Percentile
36.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.3 · HIGH
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
EPSS
0.00430 · 36.1th percentile
Weakness
CWE-359 · Exposure of Private Personal Information to an Unauthorized Actor
Published
2026-06-29T17:24Z
EPSS history
Timeline
  • 29 JUN 17:24Z
    Hi.Events 1.9.0 - Unauthenticated Attendee PII Exposure via Check-in List short_id
    cvelistv5