Summaryinfo

A vulnerability was found in ON24 Q&A Chat and classified as problematic. Affected by this issue is some unknown functionality of the file console-survey/api/v1/answer/ of the component History Handler. Executing a manipulation can lead to authorization. This vulnerability is registered as CVE-2026-3321. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in ON24 Q&A Chat (the affected version is unknown) and classified as problematic. This vulnerability affects an unknown code of the file console-survey/api/v1/answer/ of the component History Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The weakness was published by Samuel De Lucas Maroto. The advisory is available at incibe.es. This vulnerability was named CVE-2026-3321 since 02/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/30/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17084). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Chat Software

Vendor

• ON24

Name

• Q&A Chat

CPE 2.3info

• 🔒

CPE 2.2info

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