{"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":"2026-09-24T14:21:46.210Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-24T14:21:46.210Z"},"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":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-90561","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-09-18T17:13:12.927986Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-18T17:23:06.547Z"}}]}}