CVE-2026-33291
Received Received - Intake
Unauthorized Access via Zendesk Ticket Creation in Discourse

Publication date: 2026-03-20

Last updated on: 2026-03-24

Assigner: GitHub, Inc.

Description
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, moderators can create Zendesk tickets for topics they do not have access to view. This affects all forums that use the Zendesk plugin. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
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Meta Information
Published
2026-03-20
Last Modified
2026-03-24
Generated
2026-06-16
AI Q&A
2026-03-21
EPSS Evaluated
2026-06-15
NVD
CVE-2026-33291
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
discourse discourse From 2026.1.0 (inc) to 2026.1.2 (exc)
discourse discourse From 2026.2.0 (inc) to 2026.2.1 (exc)
discourse discourse 2026.3.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

This vulnerability affects the Discourse open-source discussion platform when using the Zendesk plugin. Prior to certain fixed versions, moderators were able to create Zendesk tickets for topics they did not have permission to view. This means that moderators could potentially access or expose information from restricted topics by creating tickets related to them.

Impact Analysis

The vulnerability could lead to unauthorized access to sensitive or restricted discussion topics by moderators who should not have permission to view them. This could result in information leakage or exposure of confidential data through Zendesk tickets created for those topics.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, update your Discourse installation to one of the patched versions: 2026.3.0-latest.1, 2026.2.1, or 2026.1.2.

No known workarounds are available, so applying the patch by upgrading is the recommended immediate step.

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