CVE-2026-55596 | THREATINT

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.

PUBLISHED Reserved 2026-06-16 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M

HIGH: 8.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

>= 53.0.0, < 53.1.4

affected

References

github.com/.../plate/security/advisories/GHSA-qj6x-xx2h-8hvv exploit

github.com/.../plate/security/advisories/GHSA-qj6x-xx2h-8hvv

github.com/udecode/plate/pull/5014

github.com/...ommit/6214914ca811adf22d0ad503154494216eed68ba

github.com/udecode/plate/releases/tag/v53.1.4

cve.org (CVE-2026-55596)

nvd.nist.gov (CVE-2026-55596)

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