CVE-2026-90561

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

Published Sep 13, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG
First Time appeared Strapi
Strapi strapi
Weaknesses CWE-79
CPEs cpe:2.3:a:strapi:strapi:*:*:*:*:*:*:*:*
Vendors & Products Strapi
Strapi strapi
References
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 9.3, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 24, 2026, 2:21 PM
Reserved
Sep 12, 2026, 11:13 AM
Status
Awaiting Analysis
Published
Sep 13, 2026, 11:17 AM
Modified
Sep 24, 2026, 9:08 PM