CVE-2026-3321 in ON24 Q&A Chat
Summary
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.
Responsible
INCIBE
Reservation
02/27/2026
Disclosure
03/30/2026
Entries
| ID | Vulnerability | CWE | Base | Temp | 0day | Today | Exp | KEV | EPSS | CTI | Cou | CVE |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 354190 | ON24 Q&A Chat History answer authorization | 639 | 5.3 | 5.3 | $0-$5k | $0-$5k | Not defined | 0.00000 | 4.23+ | Not defined | CVE-2026-3321 |