Description
A new API endpoint introduced in pretix 2025 that is supposed to
return all check-in events of a specific event in fact returns all
check-in events belonging to the respective organizer. This allows an
API consumer to access information for all other events under the same
organizer, even those they should not have access to.


These records contain information on the time and result of every ticket scan as well as the ID of the matched ticket. Example:


{
"id": 123,
"successful": true,
"error_reason": null,
"error_explanation": null,
"position": 321,
"datetime": "2020-08-23T09:00:00+02:00",
"list": 456,
"created": "2020-08-23T09:00:00+02:00",
"auto_checked_in": false,
"gate": null,
"device": 1,
"device_id": 1,
"type": "entry"
}



An unauthorized user usually has no way to match these IDs (position) back to individual people.
Published: 2026-04-08
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized disclosure of event check‑in data
Action: Patch
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-wr8q-c73g-m7gp pretix: API leaks check-in data between events of the same organizer
History

Fri, 24 Apr 2026 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:pretix:pretix:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


Wed, 08 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Title API Endpoint Exposes All Check‑In Events to Unauthorized Users

Wed, 08 Apr 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Pretix
Pretix pretix
Vendors & Products Pretix
Pretix pretix

Wed, 08 Apr 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 08 Apr 2026 12:45:00 +0000

Type Values Removed Values Added
Description A new API endpoint introduced in pretix 2025 that is supposed to return all check-in events of a specific event in fact returns all check-in events belonging to the respective organizer. This allows an API consumer to access information for all other events under the same organizer, even those they should not have access to. These records contain information on the time and result of every ticket scan as well as the ID of the matched ticket. Example: { "id": 123, "successful": true, "error_reason": null, "error_explanation": null, "position": 321, "datetime": "2020-08-23T09:00:00+02:00", "list": 456, "created": "2020-08-23T09:00:00+02:00", "auto_checked_in": false, "gate": null, "device": 1, "device_id": 1, "type": "entry" } An unauthorized user usually has no way to match these IDs (position) back to individual people.
Weaknesses CWE-653
References
Metrics cvssV4_0

{'score': 5.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: rami.io

Published:

Updated: 2026-04-08T16:03:07.473Z

Reserved: 2026-04-05T12:25:54.058Z

Link: CVE-2026-5600

cve-icon Vulnrichment

Updated: 2026-04-08T16:03:04.613Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-08T13:16:43.543

Modified: 2026-04-24T17:46:14.777

Link: CVE-2026-5600

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-08T19:39:39Z

Weaknesses