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Vulnerabilities

CVE-2026-27162

Medium
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, `posts_nearby` was checking topic access but then returning all posts regardless of type, includin
CWE-200 — Weakness Type
Published: Feb 26, 2026  ·  Modified: Mar 5, 2026  ·  Source: NVD
CVSS v3
4.9
🔗 NVD Official
📄 Description (English)

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, `posts_nearby` was checking topic access but then returning all posts regardless of type, including whispers that should only be visible to whisperers. Use `Post.secured(guardian)` to properly filter post types based on user permissions. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

🤖 AI Executive Summary

Discourse discussion platform versions prior to 2025.12.2, 2026.1.1, and 2026.2.0 contain an information disclosure vulnerability where the posts_nearby function returns whispered posts to unauthorized users. The vulnerability allows users to view private whispered messages that should only be visible to designated whisperers, bypassing proper permission checks.

📄 Description (Arabic)

تحتوي منصة Discourse على ثغرة كشف معلومات في وظيفة posts_nearby التي تفشل في التحقق من نوع المنشور بشكل صحيح. تسمح الثغرة بإرجاع جميع المنشورات بما فيها الرسائل الهمسية الخاصة للمستخدمين غير المصرح لهم برؤيتها. يتم إصلاح المشكلة باستخدام Post.secured(guardian) للتصفية الصحيحة بناءً على أذونات المستخدم.

🤖 ملخص تنفيذي (AI)

منصة Discourse للنقاش تحتوي على ثغرة كشف معلومات في الإصدارات السابقة للإصدارات 2025.12.2 و 2026.1.1 و 2026.2.0 حيث تعيد وظيفة posts_nearby الرسائل الهمسية للمستخدمين غير المصرح لهم. تسمح الثغرة للمستخدمين برؤية الرسائل الخاصة التي يجب أن تكون مرئية فقط للمخاطبين المعينين.

🤖 AI Intelligence Analysis Analyzed: May 30, 2026 07:07
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: medium
🏢 Affected Saudi Sectors
government telecom
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
5.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade Discourse to version 2025.12.2, 2026.1.1, or 2026.2.0 or later immediately. Ensure Post.secured(guardian) is properly implemented in posts_nearby function to filter posts based on user permissions. Review access logs for unauthorized whisper post access and audit user permissions.
🔧 خطوات المعالجة (العربية)
قم بترقية Discourse إلى الإصدار 2025.12.2 أو 2026.1.1 أو 2026.2.0 أو أحدث فوراً. تأكد من تطبيق Post.secured(guardian) بشكل صحيح في وظيفة posts_nearby لتصفية المنشورات بناءً على أذونات المستخدم. راجع سجلات الوصول للوصول غير المصرح للمنشورات الهمسية وتدقيق أذونات المستخدم.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
7.1.2 7.2.1
🔵 SAMA CSF
AC-3 AC-6
🟡 ISO 27001:2022
A.9.1.1 A.9.4.3
📦 Affected Products / CPE 3 entries
discourse:discourse
discourse:discourse
discourse:discourse:2026.2.0
📊 CVSS Score
4.9
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredH — High
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityN — None / Network
AvailabilityN — None / Network
📋 Quick Facts
Severity Medium
CVSS Score4.9
CWECWE-200
Exploit No
Patch ✗ No
Published 2026-02-26
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
5.0
/ 10.0 — Saudi Risk
Priority: MEDIUM
🏷️ Tags
CWE-200
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