CVE-2026-33424

MEDIUM
2026-03-20 GitHub_M
5.9
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Mar 20, 2026 - 23:31 vuln.today
CVE Published
Mar 20, 2026 - 23:08 nvd
MEDIUM 5.9

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, an attacker can grant access to a private message topic through invites even after they lose access to that PM. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Analysis

Discourse versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain an access control bypass vulnerability where attackers can grant invites to private message topics even after losing direct access to those conversations. This authentication bypass (CWE-863) allows unauthorized lateral privilege escalation within discussion communities. …

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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

30
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +30
POC: 0

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CVE-2026-33424 vulnerability details – vuln.today
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