CVE-2026-55596CWE-79

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

High · published July 8, 2026

CVSS v3.1
8.7
EPSS
0%
Percentile
36.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00430 · 36.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-08T20:27Z
EPSS history
Timeline
  • 08 JUL 20:27Z
    Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript
    cvelistv5