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CVE-2023-34245

Cross site scripting (XSS) in @udecode/plate-link

MEDIUM
6.1
CVSS Score
Published: June 9, 2023 at 05:04 PM UTC
Updated: June 17, 2026 at 06:03 AM UTC
1 product affected across 1 vendorPlate

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

@udecode/plate-link is the link handler for the udecode/plate rich-text editor plugin system for Slate & React. Affected versions of the link plugin and link UI component do not sanitize URLs to prevent use of the `javascript:` scheme. As a result, links with JavaScript URLs can be inserted into the Plate editor through various means, including opening or pasting malicious content. `@udecode/plate-link` 20.0.0 resolves this issue by introducing an `allowedSchemes` option to the link plugin, defaulting to `['http', 'https', 'mailto', 'tel']`. URLs using a scheme that isn't in this list will not be rendered to the DOM. Users are advised to upgrade. Users unable to upgrade are advised to override the `LinkElement` and `PlateFloatingLink` components with implementations that explicitly check the URL scheme before rendering any anchor elements.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Plate· Udecodenpm
95%
v < 20.0.0
Affected range stops below 20.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/udecode/plate/commit/93dd5712854660874900ae12e4d8e6ff28089eb7
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/udecode/plate/security/advisories/GHSA-4882-hxpr-hrvm

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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