CVE-2026-33428

MEDIUM
2026-03-20 GitHub_M
6.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 20, 2026 - 23:46 vuln.today
CVE Published
Mar 20, 2026 - 23:21 nvd
MEDIUM 6.5

Tags

Authentication Bypass

Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a non-staff user with elevated group membership could access deleted posts belonging to any user due to an overly broad authorization check on the deleted posts index endpoint. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Analysis

An authorization bypass vulnerability exists in Discourse prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, where non-staff users with elevated group membership can access deleted posts belonging to any user through an overly permissive authorization check on the deleted posts index endpoint. This is a CWE-863 (Incorrect Authorization) vulnerability that allows unauthorized information disclosure of deleted content. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

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CVE-2026-33428 vulnerability details – vuln.today
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