eventyay-exhibition through commit f68888e Cross-Event Attendee Data Disclosure via Lead Creation API

Advisories

eventyay-exhibition through commit f68888e Cross-Event Attendee Data Disclosure via Lead Creation API

Severity: low
Date: 11/5/2026
Affecting: eventyay-exhibition f68888e312c220588ddc13f8bbc4bab927b5e530
CVE: CVE-2026-122325
CWE: CWE-639 Authorization Bypass Through User-Controlled Key
CVSS: 2.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References: https://github.com/fossasia/eventyay-exhibition/issues/343
https://github.com/fossasia/eventyay-exhibition/pull/383
https://github.com/fossasia/eventyay-exhibition/blob/f68888e312c220588ddc13f8bbc4bab927b5e530/exhibition/api.py#L399-L470
https://hackmd.io/@hieuPenguinnn/eventyay-exhibition-cross-event-lead-idor
https://github.com/fossasia/eventyay-exhibition
Credit: hieuPenguinnn
Description: fossasia eventyay-exhibition through commit f68888e contains an authorization bypass vulnerability in the exhibitor lead creation API that allows exhibitors to access other organizers' attendee data. Exhibitors with lead scanning enabled can submit another event's pseudonymization id or order secret while naming that organizer in the URL to retrieve attendee names, emails, addresses and answers.

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