PT-2026-56579 · Decode · Plate

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-55596

Mitre

CVSS v3.1

8.7

High

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-55596

Affected Products

Plate

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-55596 · Security Note
• https://github.com/udecode/plate/commit/6214914ca811adf22d0ad503154494216eed68ba · Note
• https://github.com/udecode/plate/security/advisories/GHSA-qj6x-xx2h-8hvv · Note
• https://github.com/udecode/plate/pull/5014 · Note
• https://github.com/udecode/plate/releases/tag/v53.1.4 · Note