CVE-2026-57960Public exploitNetwork attack vector

Unauthenticated attendee PII exposure via check-in capability URL

Published Jun 29, 2026 · Updated Jun 29, 2026

Improper access control in Hi.Events 1.9.0 and earlier allows remote attackers to read attendee PII through public check-in URLs. Public check-in routes lack authentication middleware, and AttendeeWithCheckInPublicResource returns email, name, and order identifiers using short_id as the sole access control. Knowledge of the 77-bit short_id is required; remote attackers who obtain it can read an event's attendee list and create or delete check-in records without authentication.

CVSS severity8.3
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Hi.Events 1.9.0 and earlier allows remote attackers to read attendee PII through public check-in URLs. Public check-in routes lack authentication middleware, and AttendeeWithCheckInPublicResource returns email, name, and order identifiers using short_id as the sole access control. Knowledge of the 77-bit short_id is required; remote attackers who obtain it can read an event's attendee list and create or delete check-in records without authentication.

The record

CVE
CVE-2026-57960
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Hi.Events
Product
Hi.Events
Classifications
CWE-359, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hi.Events · Hi.Eventsversion=0 <=1.9.0

Published CVSS scores

8.3VulnCheck CNACVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
6.5VulnCheck CNACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-359Exposure of Private Personal Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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