> CVE-2026-33425 [MEDIUM]

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PUBLISHED
2026-03-21 00:16
MODIFIED
2026-03-21 00:16
CVSS_SCORE V3
6.9
EPSS (Prob. Exploit)
0.77%
Top 45.0%
🎯 NUCLEI TEMPLATE
DATA SOURCES:
NVD 🔗 2026-03-21 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 NUCLEI 🔗 2026-11-08

> DESCRIPTION

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, unauthenticated users can determine whether a specific user is a member of a private group by observing changes in directory results when using the `exclude_groups` parameter. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, disable public access to the user directory via Admin → Settings → hide user profiles from public.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-203 CWE-639 CWE-862

> CWE DETAILED DESCRIPTIONS

CWE-203: Observable Discrepancy - The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor. | CWE-639: Authorization Bypass Through User-Controlled Key - The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. | CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

> NUCLEI TEMPLATES

Des templates Nuclei sont disponibles pour scanner cette vulnérabilité.

🎯
CVE-2026-33425.yaml
http/cves/2026/CVE-2026-33425.yaml
Usage: nuclei -t http/cves/2026/CVE-2026-33425.yaml -u target.com

> HISTORIQUE DES MODIFICATIONS

Première apparition
21/03/2026 00:16
Source: NVD
📊 ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-203: Observable Discrepancy - The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes securit...
Nouvelle valeur:
CWE-203: Observable Discrepancy - The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor. | CWE-639: Authorizat...
📊 ENRICHISSEMENT 01/04/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-203: Observable Discrepancy - The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes securit...
Total des modifications: 2 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/discourse/discourse/security/advisories/GHSA-r6rh-xvf5-r5f2
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