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CVE-2026-55596— Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript

CVSS 8.7 · High
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I. Basic Information for CVE-2026-55596

Vulnerability Information
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Vulnerability Title
Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript
Source: NVD (National Vulnerability Database)
Vulnerability Description
Plate is a rich-text editor with AI and shadcn/ui. From 53.0.0 until 53.1.4, the media embed renderer trusts serialized provider or sourceUrl metadata in useMediaState and skips parseMediaUrl protocol validation, allowing a crafted Plate document to set a known video provider while keeping url as a javascript: iframe source that the registry MediaEmbedElement renders directly as an iframe src when a victim opens the document. This issue is fixed in version 53.1.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
udecodeplate >= 53.0.0, < 53.1.4 -

II. Public POCs for CVE-2026-55596

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7889 chars
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III. Intelligence Information for CVE-2026-55596

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Patches & Fixes for CVE-2026-55596 (2)

Vendor Advisories for CVE-2026-55596 (1)

Other References for CVE-2026-55596 (1)

IV. Related Vulnerabilities

Same product: plate
Same vendor: udecode
Same weakness: CWE-79

V. Comments for CVE-2026-55596

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