Vulnerability record · CVE-2026-55596 · published 8 July 2026

CVE-2026-55596: Cross-site scripting vulnerability

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.

8.7 CVSS 3.1 High EPSS 0.43% · top 65.3% CWE-79 · Cross-site scripting Deferred

8.7CVSS 3.1 base score

0.43%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

10 Jul 2026Last modified by NVD

Description

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

References

Link	Tags
https://github.com/udecode/plate/commit/6214914ca811adf22d0ad503154494216eed68ba
https://github.com/udecode/plate/pull/5014
https://github.com/udecode/plate/releases/tag/v53.1.4
https://github.com/udecode/plate/security/advisories/GHSA-qj6x-xx2h-8hvv
https://github.com/udecode/plate/security/advisories/GHSA-qj6x-xx2h-8hvv

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Source: NIST National Vulnerability Database (record CVE-2026-55596), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.