{"item": {"cve_id": "CVE-2023-27350", "ghsa_id": "", "osv_id": "", "title": "CVE-2023-27350", "description": "This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.", "published_at": "2023-04-20T16:15:07.653", "modified_at": "2026-06-17T05:44:50.950", "vendor": "Papercut", "product": "Papercut Mf", "affected_versions": ["22.0.5 (Build 63914)"], "fixed_versions": [], "cvss_score": 9.8, "cvss_version": "3.1", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "severity": "CRITICAL", "epss_score": 0.99999, "epss_percentile": 0.99995, "epss_date": "2026-10-06", "is_kev": true, "kev_date": "2023-04-21", "kev_due_date": "2023-05-12", "kev_action": "Apply updates per vendor instructions.", "cwe_ids": ["CWE-284"], "attack_vector": "NETWORK", "attack_complexity": "LOW", "privileges_required": "NONE", "user_interaction": "NONE", "references": ["http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html", "http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html", "http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html", "http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html", "https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/", "https://www.papercut.com/kb/Main/PO-1216-and-PO-1219", "https://www.zerodayinitiative.com/advisories/ZDI-23-233/", "http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html", "http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html", "http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html", "http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html", "https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/", "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350"], "source_urls": {"NVD": "https://nvd.nist.gov/vuln/detail/CVE-2023-27350", "CVE.org": "https://www.cve.org/CVERecord?id=CVE-2023-27350", "CISA": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350", "FIRST EPSS": "https://api.first.org/data/v1/epss?cve=CVE-2023-27350"}, "patch_available": null, "workaround_available": null, "sources": ["NVD", "CVE.org", "CISA", "FIRST EPSS"], "reference_items": [{"url": "http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html", "tags": ["Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/", "tags": ["Third Party Advisory"], "source": "NVD", "name": ""}, {"url": "https://www.papercut.com/kb/Main/PO-1216-and-PO-1219", "tags": ["Vendor Advisory"], "source": "NVD", "name": ""}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-233/", "tags": ["Third Party Advisory", "VDB Entry"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html", "tags": ["Third Party Advisory", "VDB Entry", "x_transferred"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry", "x_transferred"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry", "x_transferred"], "source": "NVD", "name": ""}, {"url": "http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html", "tags": ["Exploit", "Third Party Advisory", "VDB Entry", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/", "tags": ["Third Party Advisory", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.papercut.com/kb/Main/PO-1216-and-PO-1219", "tags": ["Vendor Advisory", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-233/", "tags": ["Third Party Advisory", "VDB Entry", "x_transferred"], "source": "NVD", "name": ""}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350", "tags": ["US Government Resource", "government-resource"], "source": "NVD", "name": ""}], "cvss_v4_score": null, "cvss_v4_vector": "", "cvss_v4_severity": "", "nvd_status": "Analyzed", "cna": "zdi", "date_reserved": "2023-02-28T00:00:00.000Z", "ssvc": {"options": {"Exploitation": "active", "Automatable": "yes", "Technical Impact": "total"}, "version": "2.0.3", "timestamp": "2023-12-22T05:01:04.658436Z", "role": "CISA Coordinator"}, "affected_products": [{"vendor": "Papercut", "product": "Papercut Mf", "ranges": ["de 8.0 à 20.1.7 (exclue)", "de 21.0.0 à 21.2.11 (exclue)", "de 22.0.0 à 22.0.9 (exclue)"], "first_unaffected": ["20.1.7", "21.2.11", "22.0.9"], "source": "NVD"}, {"vendor": "Papercut", "product": "Papercut Ng", "ranges": ["de 8.0 à 20.1.7 (exclue)", "de 21.0.0 à 21.2.11 (exclue)", "de 22.0.0 à 22.0.9 (exclue)"], "first_unaffected": ["20.1.7", "21.2.11", "22.0.9"], "source": "NVD"}, {"vendor": "PaperCut", "product": "NG", "ranges": ["22.0.5 (Build 63914)"], "first_unaffected": [], "source": "CVE.org"}], "kev_name": "PaperCut MF/NG Improper Access Control Vulnerability", "kev_short_description": "PaperCut MF/NG contains an improper access control vulnerability within the SetupCompleted class that allows authentication bypass and code execution in the context of system.", "kev_ransomware": "Known", "kev_notes": "https://www.papercut.com/kb/Main/PO-1216-and-PO-1219;  https://nvd.nist.gov/vuln/detail/CVE-2023-27350", "kev_cwes": ["CWE-284"], "wordfence_id": "", "mentions_sources": [], "version_match": "unknown", "risk_score": 81, "risk_class": "Critique", "impact": {"confidentialite": "élevé", "integrite": "élevé", "disponibilite": "élevé", "summary": "Un attaquant exploitant cette vulnérabilité pourrait, selon les conditions décrites par les sources, exploitable à distance (réseau), sans authentification préalable, affecter la confidentialité des données, l'intégrité du système et la disponibilité du service.", "basis": "CVSS 3.1"}, "mechanism": "Contrôle d'accès incorrect : un accès est autorisé alors qu'il ne devrait pas l'être.", "mitigation": {"correction": {"available": true, "text": "Mettre à jour : selon les sources, ne sont plus concernées les versions à partir de Papercut Mf 20.1.7, Papercut Mf 21.2.11, Papercut Mf 22.0.9, Papercut Ng 20.1.7, Papercut Ng 21.2.11."}, "mitigation": {"specific": "Aucune mesure de mitigation spécifique confirmée par les sources consultées. Consultez les références officielles pour d'éventuelles mesures détaillées.", "general": ["Maintenir le produit à jour et activer les mises à jour de sécurité.", "Restreindre l'exposition réseau du service au strict nécessaire.", "Appliquer le principe du moindre privilège.", "Surveiller les journaux et les alertes de sécurité."], "specific_links": []}, "containment": {"applicable": true, "actions": ["Action recommandée par la CISA : Apply updates per vendor instructions.", "Isoler ou restreindre l'accès au service concerné.", "Restreindre les flux réseau entrants/sortants liés au composant.", "Renforcer la surveillance des journaux et des accès.", "Désactiver temporairement le composant vulnérable si l'activité le permet."]}, "note": "Priorité aux consignes officielles de l'éditeur et des références. Vérifiez toujours l'avis de sécurité avant toute intervention en production.", "official_links": [{"url": "https://www.papercut.com/kb/Main/PO-1216-and-PO-1219", "groupe": "avis_editeur", "groupe_titre": "Avis de sécurité de l'éditeur", "editeur": "", "domaine": "www.papercut.com"}]}, "plain": {"verdict": "now", "verdict_label": "Exploité par des attaquants · à traiter aujourd'hui", "verdict_css": "now", "verdict_rank": 0, "headline": "Un accès est autorisé alors qu'il ne devrait pas l'être, à distance et sans compte", "headline_is_derived": true, "action": "Mettre à jour vers Papercut Mf 20.1.7, Papercut Mf 21.2.11, Papercut Mf 22.0.9, Papercut Ng 20.1.7 ou plus récent, version publiée comme non concernée.", "action_kind": "update", "concerned": [{"version": "Papercut Mf 20.1.7, Papercut Mf 21.2.11, Papercut Mf 22.0.9, Papercut Ng 20.1.7 ou plus récent", "state": "safe", "state_label": "Non concerné", "todo": "Rien à faire. Gardez les mises à jour automatiques activées."}, {"version": "22.0.5 (Build 63914)", "state": "hit", "state_label": "Concerné", "todo": "Mettre à jour vers Papercut Mf 20.1.7, Papercut Mf 21.2.11, Papercut Mf 22.0.9, Papercut Ng 20.1.7 ou plus récent, version publiée comme non concernée."}, {"version": "Je ne connais pas ma version", "state": "unknown", "state_label": "À vérifier", "todo": "La version s'affiche généralement dans le menu « À propos » ou « Aide » du logiciel."}], "steps": [{"title": "Sauvegarder avant d'intervenir", "detail": "Une copie récente des données et de la configuration. Si votre hébergeur propose une sauvegarde en un clic, c'est le moment.", "duration": "10 min", "priority": false}, {"title": "Mettre à jour vers Papercut Mf 20.1.7, Papercut Mf 21.2.11, Papercut Mf 22.0.9, Papercut Ng 20.1.7 ou plus récent, version publiée comme non concernée", "detail": "C'est la correction officielle. Tant qu'elle n'est pas appliquée, les autres mesures ne sont que temporaires.", "duration": "15 à 45 min", "priority": true}, {"title": "En attendant : réduire l'exposition sur Internet", "detail": "La faille est exploitable à distance. Limiter l'accès au service depuis l'extérieur (pare-feu, filtrage d'adresses, VPN) réduit fortement le risque.", "duration": "30 min", "priority": false}, {"title": "Vérifier que vous n'avez pas déjà été touché", "detail": "Cette faille est activement exploitée. Contrôler les comptes créés récemment, les connexions inhabituelles et les fichiers modifiés depuis la date de publication.", "duration": "30 min", "priority": true}, {"title": "Confirmer que tout fonctionne encore", "detail": "Après correction : page d'accueil, connexion, et les deux ou trois fonctions dont vous vous servez tous les jours.", "duration": "10 min", "priority": false}], "exploited": true, "exploited_label": "Oui, des attaques réelles sont constatées", "fixed_label": "Papercut Mf 20.1.7, Papercut Mf 21.2.11, Papercut Mf 22.0.9, Papercut Ng 20.1.7 (non concernée selon les sources)", "affected_label": "22.0.5 (Build 63914)"}, "severity_display": "Critique", "cvss_is_legacy": false, "risk_score_computable": true, "identifier": "CVE-2023-27350", "severity_fr": "Critique", "epss_pct": 100.0, "source_records": [{"source": "NVD", "label": "NVD, NIST", "date_label": "Publié dans la base", "date": "2023-04-20", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-27350"}, {"source": "CVE.org", "label": "CVE.org, programme CVE", "date_label": "Publié par l'organisme CNA", "date": "2023-04-20", "url": "https://www.cve.org/CVERecord?id=CVE-2023-27350"}, {"source": "CISA", "label": "CISA KEV", "date_label": "Ajout au catalogue", "date": "2023-04-21", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350"}, {"source": "FIRST EPSS", "label": "FIRST EPSS", "date_label": "Score daté du", "date": "2026-10-06", "url": "https://api.first.org/data/v1/epss?cve=CVE-2023-27350"}], "exploit_public": true, "reseau_sans_auth": true, "exposition": "À distance, sans compte et sans action d'un utilisateur"}, "presentation": {"en_bref": [{"question": "Est-elle attaquée ?", "ton": "alerte", "reponse": "Oui, attaques constatées", "source": "Catalogue CISA KEV"}, {"question": "Existe-t-il un correctif ?", "ton": "bon", "reponse": "Oui : 20.1.7, 21.2.11, 22.0.9", "source": "Versions publiées comme non concernées"}, {"question": "Comment l'attaquer ?", "ton": "alerte", "reponse": "À distance, sans compte et sans action d'un utilisateur", "source": "Vecteur CVSS publié"}, {"question": "Risque d'exploitation", "ton": "alerte", "reponse": "100,0 % sur 30 jours", "source": "Plus probable que 100 % des failles connues"}], "references": [{"cle": "avis_editeur", "titre": "Avis de sécurité de l'éditeur", "explication": "La parole de l'éditeur du produit : elle fait foi pour savoir quoi installer.", "items": [{"url": "https://www.papercut.com/kb/Main/PO-1216-and-PO-1219", "domaine": "www.papercut.com", "editeur": "", "etiquettes": ["Avis de l'éditeur"], "nom": "", "lien": true, "casse": false}]}, {"cle": "avis_tiers", "titre": "Avis d'autorités et d'organismes tiers", "explication": "CERT, agences gouvernementales, bases de vulnérabilités, chercheurs.", "items": [{"url": "http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": false}, {"url": "https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/", "domaine": "news.sophos.com", "editeur": "", "etiquettes": ["Avis d'un tiers"], "nom": "", "lien": true, "casse": false}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-233/", "domaine": "www.zerodayinitiative.com", "editeur": "Zero Day Initiative", "etiquettes": ["Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": true, "casse": false}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350", "domaine": "www.cisa.gov", "editeur": "CISA", "etiquettes": ["Ressource gouvernementale américaine", "Ressource gouvernementale"], "nom": "", "lien": true, "casse": false}]}, {"cle": "exploit", "titre": "Codes d'exploitation référencés", "explication": "Les sources signalent un code d'exploitation public. Par prudence, CyberAlert affiche le site qui l'héberge sans lien direct : l'information utile ici est son existence, qui rend la faille plus facile à attaquer.", "items": [{"url": "http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Code d'exploitation", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": false, "casse": false}, {"url": "http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Code d'exploitation", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": false, "casse": false}, {"url": "http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html", "domaine": "packetstormsecurity.com", "editeur": "Packet Storm", "etiquettes": ["Code d'exploitation", "Avis d'un tiers", "Base de vulnérabilités"], "nom": "", "lien": false, "casse": false}]}], "liens_correction": [{"url": "https://www.papercut.com/kb/Main/PO-1216-and-PO-1219", "domaine": "www.papercut.com", "editeur": "", "etiquettes": ["Avis de l'éditeur"], "nom": "", "lien": true, "casse": false, "groupe": "avis_editeur", "groupe_titre": "Avis de sécurité de l'éditeur"}], "nb_exploits": 3, "cvss": {"version": "3.1", "vecteur": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "metriques": [{"code": "AV", "nom": "Vecteur d'attaque", "valeur": "Réseau (à distance, y compris par Internet)", "brut": "N", "explication": "D'où l'attaquant doit agir."}, {"code": "AC", "nom": "Complexité de l'attaque", "valeur": "Faible", "brut": "L", "explication": "Conditions hors du contrôle de l'attaquant."}, {"code": "PR", "nom": "Privilèges requis", "valeur": "Aucun (pas de compte)", "brut": "N", "explication": "Droits dont l'attaquant a besoin avant d'attaquer."}, {"code": "UI", "nom": "Interaction de l'utilisateur", "valeur": "Aucune", "brut": "N", "explication": "Une victime doit-elle cliquer ou ouvrir quelque chose ?"}, {"code": "S", "nom": "Portée", "valeur": "Inchangée", "brut": "U", "explication": "L'attaque peut-elle toucher d'autres composants que celui qui est vulnérable ?"}, {"code": "C", "nom": "Confidentialité", "valeur": "Élevé", "brut": "H", "explication": "Accès à des informations protégées."}, {"code": "I", "nom": "Intégrité", "valeur": "Élevé", "brut": "H", "explication": "Modification de données ou du système."}, {"code": "A", "nom": "Disponibilité", "valeur": "Élevé", "brut": "H", "explication": "Arrêt ou ralentissement du service."}], "calculateur": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "specification": "https://www.first.org/cvss/v3.1/specification-document"}, "cvss4": null, "cwe": [{"id": "CWE-284", "nom": "Improper Access Control", "url": "https://cwe.mitre.org/data/definitions/284.html"}], "ssvc": {"lignes": [{"nom": "Exploitation", "valeur": "Exploitation active constatée", "brut": "active"}, {"nom": "Automatisable", "valeur": "Oui : l'attaque peut être enchaînée sans intervention humaine", "brut": "yes"}, {"nom": "Impact technique", "valeur": "Total : contrôle complet du composant ou de ses informations", "brut": "total"}], "version": "2.0.3", "date": "2023-12-22", "role": "CISA Coordinator", "url": "https://www.cisa.gov/stakeholder-specific-vulnerability-categorization-ssvc"}, "chronologie": [{"date": "2023-02-28", "libelle": "Identifiant réservé", "qui": "Programme CVE"}, {"date": "2023-04-20", "libelle": "Publication de la vulnérabilité", "qui": "zdi"}, {"date": "2023-04-21", "libelle": "Ajout au catalogue des failles exploitées", "qui": "CISA"}, {"date": "2023-05-12", "libelle": "Échéance de correction fixée par la CISA", "qui": "CISA"}, {"date": "2023-12-22", "libelle": "Décision SSVC publiée", "qui": "CISA"}, {"date": "2026-06-17", "libelle": "Dernière mise à jour de la fiche source", "qui": "Source"}, {"date": "2026-10-06", "libelle": "Calcul du score EPSS affiché", "qui": "FIRST"}], "liens_officiels": [{"nom": "NVD (NIST)", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-27350", "description": "Fiche de référence : CVSS, CPE, références étiquetées."}, {"nom": "CVE.org", "url": "https://www.cve.org/CVERecord?id=CVE-2023-27350", "description": "Enregistrement officiel publié par l'organisme qui a attribué l'identifiant."}, {"nom": "CISA KEV", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350", "description": "Entrée du catalogue des failles activement exploitées."}, {"nom": "FIRST EPSS", "url": "https://api.first.org/data/v1/epss?cve=CVE-2023-27350", "description": "Score de probabilité d'exploitation du jour."}, {"nom": "OSV.dev", "url": "https://osv.dev/vulnerability/CVE-2023-27350", "description": "Paquets open source concernés et versions corrigées."}, {"nom": "GitHub Advisory Database", "url": "https://github.com/advisories?query=CVE-2023-27350", "description": "Avis de sécurité des dépendances logicielles."}], "produits": [{"vendor": "Papercut", "product": "Papercut Mf", "ranges": ["de 8.0 à 20.1.7 (exclue)", "de 21.0.0 à 21.2.11 (exclue)", "de 22.0.0 à 22.0.9 (exclue)"], "first_unaffected": ["20.1.7", "21.2.11", "22.0.9"], "source": "NVD"}, {"vendor": "Papercut", "product": "Papercut Ng", "ranges": ["de 8.0 à 20.1.7 (exclue)", "de 21.0.0 à 21.2.11 (exclue)", "de 22.0.0 à 22.0.9 (exclue)"], "first_unaffected": ["20.1.7", "21.2.11", "22.0.9"], "source": "NVD"}, {"vendor": "PaperCut", "product": "NG", "ranges": ["22.0.5 (Build 63914)"], "first_unaffected": [], "source": "CVE.org"}], "notes_kev": ["https://www.papercut.com/kb/Main/PO-1216-and-PO-1219", "https://nvd.nist.gov/vuln/detail/CVE-2023-27350"]}, "consulted_at": "2026-10-06T16:49:16.135950+00:00"}