CVE-2026-55596

Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript

Published Jul 8, 2026 CVSS 3.1 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-qj6x-xx2h-8hvv Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Udecode
Udecode plate
Vendors & Products Udecode
Udecode plate
Type Values Removed Values Added
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.
Title Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript
Weaknesses CWE-79
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 9, 2026, 1:41 PM
Reserved
Jun 16, 2026, 11:18 PM
Status
Deferred
Published
Jul 8, 2026, 9:16 PM
Modified
Oct 25, 2026, 5:10 PM