Hi.Events 1.9.0 - Unauthenticated Attendee PII Exposure via Check-in List short_id
Priority HIGH 69CWE-359Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-359.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00419 36th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| HiEventsDev | Hi.Events | up to 1.9.0 | — | No fix listed | CNA |
- Hi.Events VendorHiEventsDev Affected up to 1.9.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-57960
- 2026-10-03 Alias added: GHSA-5v9v-qj76-f3m4
References
Patch 1
Other 1
More HiEventsDev vulnerabilities
- TI-2026-42835 Hi.Events < 1.11.0 Hidden Ticket Enumeration via Order Creation Endpoint CVSS 4.0MEDIUM 6.9
- TI-2026-53674 Hi.Events before 1.11.1-beta Server-Side Request Forgery via Unvalidated Webhook Redirects CVSS 4.0HIGH 8.4
- TI-2026-41725 Hi.Events 1.9.0 - Promo Code Max-Usage Bypass via Asynchronous Job Race Condition CVSS 4.0HIGH 8.2
- TI-2026-42836 Hi.Events < 1.11.0 XSS via Event Title JSON.stringify Injection CVSS 4.0MEDIUM 5.1
Sources
- CVE-2026-57960 · CVE Program
- CVE-2026-57960 · NVD
- FIRST EPSS
- GHSA-5v9v-qj76-f3m4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences