CVE-2025-27801

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This allowed an authenticated attacker to execute malicious JavaScript code in the victim's browser.<br><br>\n\n<span style=\"background-color: rgb(255, 255, 255);\">ContentReference properties, which could be used in the \"Edit\" section of the CMS, offered an upload functionality for documents. These documents could later be used as displayed content on the page. It was possible to upload SVG files that include malicious JavaScript code that would be executed if a user visited the direct URL of the preview image. Attackers needed at least the role \"WebEditor\" in order to exploit this issue.</span>\n\n</span><br>\n\n<br>\n\nAffected products: Version 11.X: EPiServer.CMS.Core (&lt;11.21.4) with EPiServer.CMS.UI (&lt;11.37.5), Version 12.X: EPiServer.CMS.Core (&lt;12.22.1) with EPiServer.CMS.UI (&lt;11.37.3)"}], "value": "The Episerver Content Management System (CMS) by Optimizely was affected by multiple Stored Cross-Site Scripting (XSS) vulnerabilities. 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Attackers needed at least the role \"WebEditor\" in order to exploit this issue.\n\n\n\n\n\n\n\nAffected products: Version 11.X: EPiServer.CMS.Core (<11.21.4) with EPiServer.CMS.UI (<11.37.5), Version 12.X: EPiServer.CMS.Core (<12.22.1) with EPiServer.CMS.UI (<11.37.3)"}], "impacts": [{"capecId": "CAPEC-63", "descriptions": [{"lang": "en", "value": "CAPEC-63 Cross-Site Scripting (XSS)"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 4.6, "baseSeverity": "MEDIUM", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:L/SC:L/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "551230f0-3615-47bd-b7cc-93e92e730bbf", "shortName": "SEC-VLab", "dateUpdated": "2025-07-29T09:37:21.584Z"}, "references": [{"tags": ["patch"], "url": "https://api.nuget.optimizely.com/packages/episerver.cms.core/11.21.4#"}, {"tags": ["patch"], "url": "https://api.nuget.optimizely.com/packages/episerver.cms.core/12.22.1#"}, {"tags": ["third-party-advisory"], "url": "https://r.sec-consult.com/optimizely"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "The vendor already provides a security patch (updated packages) which should be \ninstalled immediately.<br>"}], "value": "The vendor already provides a security patch (updated packages) which should be \ninstalled immediately."}], "source": {"discovery": "UNKNOWN"}, "title": "Stored Cross-Site Scripting in Episerver Content Management System (CMS) Media Selection Preview", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-07-28T16:48:16.253770Z", "id": "CVE-2025-27801", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-07-28T16:49:08.730Z"}}, {"title": "CVE Program Container", "references": [{"url": "http://seclists.org/fulldisclosure/2025/Aug/18"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:46:25.984Z"}}]}}

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This allowed an authenticated attacker to execute malicious JavaScript code in the victim's browser.\n\n\n\nContentReference properties, which could be used in the \"Edit\" section of the CMS, offered an upload functionality for documents. These documents could later be used as displayed content on the page. It was possible to upload SVG files that include malicious JavaScript code that would be executed if a user visited the direct URL of the preview image. Attackers needed at least the role \"WebEditor\" in order to exploit this issue.\n\n\n\n\n\n\n\nAffected products: Version 11.X: EPiServer.CMS.Core (<11.21.4) with EPiServer.CMS.UI (<11.37.5), Version 12.X: EPiServer.CMS.Core (<12.22.1) with EPiServer.CMS.UI (<11.37.3)", "supportingMedia": [{"type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">The Episerver Content Management System (CMS) by Optimizely was affected by multiple Stored Cross-Site Scripting (XSS) vulnerabilities. This allowed an authenticated attacker to execute malicious JavaScript code in the victim's browser.<br><br>\n\n<span style=\"background-color: rgb(255, 255, 255);\">ContentReference properties, which could be used in the \"Edit\" section of the CMS, offered an upload functionality for documents. These documents could later be used as displayed content on the page. It was possible to upload SVG files that include malicious JavaScript code that would be executed if a user visited the direct URL of the preview image. Attackers needed at least the role \"WebEditor\" in order to exploit this issue.</span>\n\n</span><br>\n\n<br>\n\nAffected products: Version 11.X: EPiServer.CMS.Core (&lt;11.21.4) with EPiServer.CMS.UI (&lt;11.37.5), Version 12.X: EPiServer.CMS.Core (&lt;12.22.1) with EPiServer.CMS.UI (&lt;11.37.3)", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "551230f0-3615-47bd-b7cc-93e92e730bbf", "shortName": "SEC-VLab", "dateUpdated": "2025-07-29T09:37:21.584Z"}}}, "cveMetadata": {"cveId": "CVE-2025-27801", "state": "PUBLISHED", "dateUpdated": "2025-07-29T09:37:21.584Z", "dateReserved": "2025-03-07T06:46:34.309Z", "assignerOrgId": "551230f0-3615-47bd-b7cc-93e92e730bbf", "datePublished": "2025-07-28T08:40:15.815Z", "assignerShortName": "SEC-VLab"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["EPiServer.CMS.Core"], "product": "Episerver Content Management System (CMS)", "vendor": "Optimizely", "versions": [{"lessThan": "11.21.4", "status": "affected", "version": "11.x", "versionType": "custom"}, {"lessThan": "12.22.1", "status": "affected", "version": "12.x", "versionType": "custom"}]}], "source": "551230f0-3615-47bd-b7cc-93e92e730bbf"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Episerver Content Management System (CMS) by Optimizely was affected by multiple Stored Cross-Site Scripting (XSS) vulnerabilities. This allowed an authenticated attacker to execute malicious JavaScript code in the victim's browser.\n\n\n\nContentReference properties, which could be used in the \"Edit\" section of the CMS, offered an upload functionality for documents. These documents could later be used as displayed content on the page. It was possible to upload SVG files that include malicious JavaScript code that would be executed if a user visited the direct URL of the preview image. Attackers needed at least the role \"WebEditor\" in order to exploit this issue.\n\n\n\n\n\n\n\nAffected products: Version 11.X: EPiServer.CMS.Core (<11.21.4) with EPiServer.CMS.UI (<11.37.5), Version 12.X: EPiServer.CMS.Core (<12.22.1) with EPiServer.CMS.UI (<11.37.3)"}, {"lang": "es", "value": "Episerver Content Management System (CMS) by Optimizely se vio afectado por m\u00faltiples vulnerabilidades de Cross-Site Scripting (XSS) almacenado. Esto permiti\u00f3 que un atacante autenticado ejecutara c\u00f3digo JavaScript malicioso en el navegador de la v\u00edctima. Las propiedades ContentReference, disponibles en la secci\u00f3n \"Edit\" del CMS, ofrec\u00edan la funci\u00f3n de carga de documentos. Estos documentos pod\u00edan utilizarse posteriormente como contenido mostrado en la p\u00e1gina. Era posible cargar archivos SVG con c\u00f3digo JavaScript malicioso que se ejecutaba si un usuario visitaba la URL directa de la imagen de vista previa. Los atacantes necesitaban al menos el rol \"WebEditor\" para explotar este problema. Productos afectados: Versi\u00f3n 11.X: EPiServer.CMS.Core (&lt;11.21.4) con EPiServer.CMS.UI (&lt;11.37.5), Versi\u00f3n 12.X: EPiServer.CMS.Core (&lt;12.22.1) con EPiServer.CMS.UI (&lt;11.37.3)"}], "id": "CVE-2025-27801", "lastModified": "2026-06-17T09:04:14.750", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 2.7, "source": "551230f0-3615-47bd-b7cc-93e92e730bbf", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 4.6, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:L/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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "551230f0-3615-47bd-b7cc-93e92e730bbf", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-27801", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-07-28T16:48:16.253770Z", "version": "2.0.3"}}]}, "published": "2025-07-28T09:15:34.590", "references": [{"source": "551230f0-3615-47bd-b7cc-93e92e730bbf", "url": "https://api.nuget.optimizely.com/packages/episerver.cms.core/11.21.4#"}, {"source": "551230f0-3615-47bd-b7cc-93e92e730bbf", "url": "https://api.nuget.optimizely.com/packages/episerver.cms.core/12.22.1#"}, {"source": "551230f0-3615-47bd-b7cc-93e92e730bbf", "url": "https://r.sec-consult.com/optimizely"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://seclists.org/fulldisclosure/2025/Aug/18"}], "sourceIdentifier": "551230f0-3615-47bd-b7cc-93e92e730bbf", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "551230f0-3615-47bd-b7cc-93e92e730bbf", "type": "Secondary"}]}

{}

{"created": "2025-07-28T15:24:21.115797+00:00", "updated": "2025-07-28T15:24:21.115885+00:00", "vendors": ["episerver", "episerver$PRODUCT$episerver", "episerver$PRODUCT$episerver_cms"]}