CVE-2026-55596: Udecode Plate

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Udecode Plate: from 53.0.0, before 53.1.4 (fixed in 53.1.4)

Published 2026-07-08. Last modified 2026-07-10.