CVE-2026-33300

| EUVD-2026-17572 MEDIUM
2026-03-31 GitHub_M
5.3
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
EUVD ID Assigned
Mar 31, 2026 - 18:16 euvd
EUVD-2026-17572
Analysis Generated
Mar 31, 2026 - 18:16 vuln.today
CVE Published
Mar 31, 2026 - 17:42 nvd
MEDIUM 5.3

Tags

Information Disclosure

Description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass in the Category Chatables Controller show action allowed moderators to get information on hidden groups names and user count. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Analysis

Discourse 2026.1.0 through 2026.3.0-beta allows authenticated moderators to bypass authorization controls in the Category Chatables Controller, disclosing sensitive information about hidden group names and user counts. The vulnerability affects multiple release branches and has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0. …

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Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +26
POC: 0

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CVE-2026-33300 vulnerability details – vuln.today
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