{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-90561", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-12T11:13:43.327Z", "datePublished": "2026-09-13T10:45:35.988Z", "dateUpdated": "2026-09-13T10:45:35.988Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-13T10:45:35.988Z" }, "datePublic": "2026-06-30T00:00:00.000Z", "title": "Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG", "descriptions": [ { "lang": "en", "value": "Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview component that fails to strip script tags from rich text. An Author-role user can store malicious script tags in rich text fields that execute in an Editor or Super Admin's session when the preview pane is expanded, enabling account takeover." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE" } ] } ], "affected": [ { "vendor": "strapi", "product": "strapi", "defaultStatus": "unaffected", "packageURL": "pkg:npm/%40strapi/strapi", "versions": [ { "version": "4.0.0", "lessThanOrEqual": "4.26.2", "status": "affected", "versionType": "semver" }, { "version": "5.0.0", "lessThan": "5.48.1", "status": "affected", "versionType": "semver" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:strapi:strapi:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0.0", "versionEndIncluding": "4.26.2" }, { "vulnerable": true, "criteria": "cpe:2.3:a:strapi:strapi:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0.0", "versionEndExcluding": "5.48.1" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH" } } ], "references": [ { "url": "https://github.com/strapi/strapi/issues/26857", "tags": [ "issue-tracking" ], "name": "GitHub Issue #26857" }, { "url": "https://github.com/strapi/strapi", "tags": [ "product" ] }, { "url": "https://github.com/strapi/strapi/blob/v5.46.0/packages/core/content-manager/admin/src/pages/EditView/components/FormInputs/Wysiwyg/PreviewWysiwyg.tsx", "tags": [ "technical-description" ] }, { "url": "https://github.com/strapi/strapi/commit/875752612c30f951546904a29469e51e17e0ac37", "tags": [ "patch" ] }, { "name": "VulnCheck Advisory: Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/strapi-4-x-through-4.26.2-and-5-x-before-5.48.1-stored-xss-via-wysiwyg" } ], "credits": [ { "lang": "en", "value": "George Chen", "type": "reporter" } ], "x_generator": { "engine": "vulncheck-endgame" } } } }