CVE-2026-3321 PUBLISHED

Authorization Bypass in ON24 Q&A chat

Assigner: INCIBE
Reserved: 27.02.2026 Published: 30.03.2026 Updated: 30.03.2026

A vulnerability of authorization bypass through user-controlled key in the 'console-survey/api/v1/answer/{EVENTID}/{TIMESTAMP}/' endpoint. Exploiting this vulnerability would allow an unauthenticated attacker to enumerate event IDs and obtain the complete Q&A history. This publicly exposed data may include IDs, private URLs, private messages, internal references, or other sensitive information that should only be exposed to authenticated users. In addition, the leaked content could be exploited to facilitate other malicious activities, such as reconnaissance for lateral movement, exploitation of related systems, or unauthorised access to internal applications referenced in the content of chat messages.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
CVSS Score: 8.7

Product Status

Vendor ON24
Product ON24 Q&A chat
Versions Default: affected
  • affected from 0 to * (incl.)

Credits

  • Samuel de Lucas Maroto finder

References

Problem Types

  • CWE-639 Authorization bypass through User-Controlled key CWE