CVE-2026-57960
Hi.Events 1.9.0 - Unauthenticated Attendee PII Exposure via Check-in List short_id
- State
- Published
- Severity
- 8.3 High
- Published
- Jun 29, 2026
- Updated
- Jul 14, 2026
- Reserved
- Jun 26, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | 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 | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N | VulnCheck |
Weaknesses
- CWE-359 Exposure of Private Personal Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
Hi.EventsHiEventsDev |
|
References
- Researcher Disclosureissue-tracking
- Pull Requestissue-tracking
- https://www.vulncheck.com/advisories/hi-events-unauthenticated-attendee-pii-exposure-via-check-in-list-short-idthird-party-advisory
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