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A cross-site scripting (XSS) vulnerability was discovered in the URL sanitization logic of the core parser of TinyMCE. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or APIs. This impacts all users who are using TinyMCE 5.5.1 or lower.
The issue has been fixed in TinyMCE 5.6.0.
WS-2021-0025 - Medium Severity Vulnerability
Vulnerable Library - tinymce-4.9.11.min.js
TinyMCE rich text editor
Library home page: https://cdnjs.cloudflare.com/ajax/libs/tinymce/4.9.11/tinymce.min.js
Path to vulnerable library: /wp-content/themes/Divi/includes/builder/frontend-builder/assets/vendors/tinymce.min.js
Dependency Hierarchy:
Found in HEAD commit: ab76dd905220f63a5e50d7a6c36543f1d876d52a
Found in base branch: master
Vulnerability Details
A cross-site scripting (XSS) vulnerability was discovered in the URL sanitization logic of the core parser of TinyMCE. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or APIs. This impacts all users who are using TinyMCE 5.5.1 or lower.
The issue has been fixed in TinyMCE 5.6.0.
Publish Date: 2021-02-19
URL: WS-2021-0025
CVSS 3 Score Details (6.1)
Base Score Metrics:
Suggested Fix
Type: Upgrade version
Origin: GHSA-w7jx-j77m-wp65
Release Date: 2021-02-19
Fix Resolution: tinymce - 5.6.0
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