CVE-2026-30888
Received Received - Intake
Privilege Escalation in Discourse via Unauthorized Policy Document Edits

Publication date: 2026-03-20

Last updated on: 2026-03-24

Assigner: GitHub, Inc.

Description
Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 allow a moderator to edit site policy documents (ToS, guidelines, privacy policy) that they are explicitly prohibited from modifying. 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
2026-03-20
EPSS Evaluated
2026-06-15
NVD
CVE-2026-30888
EUVD
EUVD-2026-13488
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-269 The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Attack-Flow Graph
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Executive Summary

CVE-2026-30888 is a low-severity vulnerability in the Discourse open-source discussion platform affecting versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2.

The vulnerability allows a moderator to escalate their privileges by exploiting an arbitrary post_id parameter through the suspend/silence endpoint.

This flaw enables a moderator to edit site policy documents such as the Terms of Service, guidelines, and privacy policy, which they are explicitly prohibited from modifying under normal circumstances.

The issue has been patched in the specified versions, and the recommended mitigation is to upgrade to one of these patched versions.

Impact Analysis

[{'type': 'paragraph', 'content': 'This vulnerability can impact you by allowing a moderator to modify critical site policy documents such as the Terms of Service, guidelines, and privacy policy without proper authorization.'}, {'type': 'paragraph', 'content': 'Unauthorized changes to these documents could lead to misinformation, misrepresentation of site policies, or potential legal and trust issues with users.'}, {'type': 'paragraph', 'content': "Since the vulnerability involves privilege escalation, it undermines the intended access controls and could affect the integrity of the platform's governance."}] [1]

Compliance Impact

I don't know

Detection Guidance

There are no specific detection commands or methods provided to identify this vulnerability on your network or system.

Mitigation Strategies

The recommended immediate step to mitigate this vulnerability is to upgrade Discourse to one of the patched versions: 2026.1.2, 2026.2.1, or 2026.3.0-latest.1.

No known workarounds are available, so applying the patch by upgrading is the only effective mitigation.

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