CVE-2026-55596Public exploitNetwork attack vector

Browser JavaScript execution via trusted media metadata

Published Jul 8, 2026 · Updated Jul 8, 2026

Cross-site scripting in Udecode Plate 53.0.0 through 53.1.3 allows remote authenticated users to execute JavaScript via a crafted document. The useMediaState fast path trusts serialized provider or sourceUrl metadata, bypasses parseMediaUrl protocol checks, and passes a javascript: URL to MediaEmbedElement as an iframe source. Exploitation requires a host application that accepts shared Plate content and a victim who opens it, exposing page data and actions available to the victim session.

CVSS severity8.7
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Udecode Plate 53.0.0 through 53.1.3 allows remote authenticated users to execute JavaScript via a crafted document. The useMediaState fast path trusts serialized provider or sourceUrl metadata, bypasses parseMediaUrl protocol checks, and passes a javascript: URL to MediaEmbedElement as an iframe source. Exploitation requires a host application that accepts shared Plate content and a victim who opens it, exposing page data and actions available to the victim session.

The record

CVE
CVE-2026-55596
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
Udecode
Product
Plate
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 53.0.0, < 53.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Udecode · Plateversion=>= 53.0.0, < 53.1.4

Published CVSS scores

8.7GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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