CVE-2026-88976: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in udecode plate
Plate is a rich-text editor with AI and shadcn/ui. Prior to 53.3.11, and in the discontinued 54.0.0-beta.0 through 54.0.0-beta.1 builds, Plate core HTML deserialization APIs parse supplied HTML strings in the active document. When an application passes untrusted or cross-user HTML to these APIs, certain HTML attributes can trigger browser behavior before the HTML is converted into editor nodes. This can allow attacker-controlled script to execute in the consuming application's origin when another user loads the deserialized content. This issue is fixed in version 53.3.11.
AI Analysis
Technical Summary
Plate's core HTML deserialization APIs parse supplied HTML strings in the active document. When untrusted or cross-user HTML is passed to these APIs in affected versions, certain HTML attributes can trigger browser behavior before conversion into editor nodes, enabling script execution in the consuming application's origin. This constitutes an improper neutralization of input during web page generation (CWE-79). The vulnerability is fixed in version 53.3.11.
Potential Impact
An attacker can execute scripts in the context of the consuming application's origin when another user loads the deserialized content. This can lead to partial confidentiality and integrity loss of data accessible to the application, but does not affect availability. The CVSS 3.1 score is 6.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and scope change.
Mitigation Recommendations
Upgrade to Plate version 53.3.11 or later. The vulnerability is fixed in this version. No other mitigation is indicated by the vendor advisory.
CVE-2026-88976: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in udecode plate
Description
Plate is a rich-text editor with AI and shadcn/ui. Prior to 53.3.11, and in the discontinued 54.0.0-beta.0 through 54.0.0-beta.1 builds, Plate core HTML deserialization APIs parse supplied HTML strings in the active document. When an application passes untrusted or cross-user HTML to these APIs, certain HTML attributes can trigger browser behavior before the HTML is converted into editor nodes. This can allow attacker-controlled script to execute in the consuming application's origin when another user loads the deserialized content. This issue is fixed in version 53.3.11.
CVSS v3.1
Score 6.1medium
Affected software
udecode
plate
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Plate's core HTML deserialization APIs parse supplied HTML strings in the active document. When untrusted or cross-user HTML is passed to these APIs in affected versions, certain HTML attributes can trigger browser behavior before conversion into editor nodes, enabling script execution in the consuming application's origin. This constitutes an improper neutralization of input during web page generation (CWE-79). The vulnerability is fixed in version 53.3.11.
Potential Impact
An attacker can execute scripts in the context of the consuming application's origin when another user loads the deserialized content. This can lead to partial confidentiality and integrity loss of data accessible to the application, but does not affect availability. The CVSS 3.1 score is 6.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and scope change.
Mitigation Recommendations
Upgrade to Plate version 53.3.11 or later. The vulnerability is fixed in this version. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-09-10T16:02:31.342Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aaaa87455bf5e2cf5bb9891
Added to database: 09/16/2026, 14:32:20 UTC
Last enriched: 09/16/2026, 14:47:01 UTC
Last updated: 09/16/2026, 15:32:24 UTC
Views: 4
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