CVE-2026-90561— Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG
Quick assessment
Affected
strapi strapi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Strapi 4.x 至 4.26.2 版本以及 5.x 5.48.1 之前的版本中，内容管理器的 WYSIWYG（所见即所得）预览组件存在存储型跨站脚本（Stored XSS）漏洞，该组件未能从富文本中剥离 标签。拥有作者（Author）角色的用户可以在富文本字段中嵌入恶意的 标签，当编辑者（Editor）或超级管理员（Super Admin）展开预览面板时，这些脚本将在其会话中执行，从而导致账户被接管（account takeover）。
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-90561
Vulnerability Information
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Vulnerability Title
Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-90561
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-90561 (2)
Vendor Advisories for CVE-2026-90561 (1)
Other References for CVE-2026-90561 (1)
IV. Related Vulnerabilities
Same product: strapi
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CVE-2026-57997
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CVE-2026-22706
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CVE-2026-22599
Strapi Vulnerable to SQL Injection in Content Type Builder
Same vendor: strapi
-
CVE-2026-57997
Strapi users-permissions - JWT Algorithm Confusion via Missi -
CVE-2026-27886
Strapi may leak sensitive data via relational filtering due -
CVE-2026-22707
Strapi Upload Plugin MIME Validation Bypass via Content API -
CVE-2026-22706
Strapi: Password Reset Does Not Revoke Existing Refresh Sess -
CVE-2026-22599
Strapi Vulnerable to SQL Injection in Content Type Builder
Same weakness: CWE-79
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CVE-2026-90772
Amundsen Frontend through 4.3.0 Stored XSS via Description -
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Booking for Appointments and Events Calendar – Amelia <= 2.4
V. Comments for CVE-2026-90561
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