CVE-2026-90561

HIGH 8.7

Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG

CVSS Score

8.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	strapi
Product	strapi
Published	Sep 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

strapi / strapi

4.0.0 ≤ 4.26.2 5.0.0 < 5.48.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/strapi/strapi/issues/26857 github.com: https://github.com/strapi/strapi github.com: https://github.com/strapi/strapi/blob/v5.46.0/packages/core/content-manager/admin/src/pages/EditView/components/FormInputs/Wysiwyg/PreviewWysiwyg.tsx github.com: https://github.com/strapi/strapi/commit/875752612c30f951546904a29469e51e17e0ac37 vulncheck.com: https://www.vulncheck.com/advisories/strapi-4-x-through-4.26.2-and-5-x-before-5.48.1-stored-xss-via-wysiwyg

Credits

🔍 George Chen