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Authorization bypass in eventyay-exhibition leaks attendee data

Priority LOW 11CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

fossasia eventyay-exhibition through commit f68888e contains an authorization bypass in its exhibitor lead creation API. The API accepts a user-controlled key, such as another event's pseudonymization id or order secret, without checking that it belongs to the organizer named in the URL (CWE-639). An exhibitor with lead scanning enabled can read other organizers' attendee names, emails, addresses and answers.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

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.

Why it matters now

EPSS 0.00223 13th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

No affected products listed by the sources yet.

Remediation

The sources list no fixed version for eventyay-exhibition.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-122325
  2. 2026-11-05 Alias added: GHSA-p4mx-h96g-vr5p
  3. 2026-11-07 Affected versions changed · Red Hat
  4. 2026-11-07 CVSS score added · Red Hat

References

  • TI-2026-45051 Open Event Server 1.19.1 Unauthenticated Member Roster Export via CSV Export Endpoint CVSS 4.0HIGH 8.7
  • TI-2025-04778 fossasia open-event-server Mail Verification mail.py send_email_change_user_email… CVSS 4.0MEDIUM 6.3
  • TI-2020-03528 Directory Traversal Vulnerability in SUSI.AI Server CVSS 3.1CRITICAL 9.1

Sources