CVE-2026-33251
Received Received - Intake
Authorization Bypass in Discourse Allows Unauthorized Solution Acceptance

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, an authorization bypass vulnerability in hidden Solved topics may allow unauthorized users to accept or unaccept solutions. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, ensure only trusted users are part of the Site Setting for accept_all_solutions_allowed_groups.
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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
2026-06-14
NVD
CVE-2026-33251
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 exists in Discourse, an open-source discussion platform, in versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2. It is an authorization bypass issue related to hidden Solved topics, which may allow unauthorized users to accept or unaccept solutions.

Impact Analysis

The impact of this vulnerability is that unauthorized users could manipulate the status of solutions in hidden Solved topics by accepting or unaccepting them. This could lead to misinformation or confusion about which solutions are valid or accepted within the discussion platform.

Compliance Impact

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Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should ensure that only trusted users are part of the Site Setting for accept_all_solutions_allowed_groups.

Additionally, apply the patch by upgrading Discourse to one of the fixed versions: 2026.3.0-latest.1, 2026.2.1, or 2026.1.2.

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