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
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: - :x: **tinymce-4.9.11.min.js** (Vulnerable Library)
Found in HEAD commit: ab76dd905220f63a5e50d7a6c36543f1d876d52a
Found in base branch: master
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
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: Required - Scope: Changed - Impact Metrics: - Confidentiality Impact: Low - Integrity Impact: Low - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://github.com/advisories/GHSA-w7jx-j77m-wp65
Release Date: 2021-02-19
Fix Resolution: tinymce - 5.6.0
Step up your Open Source Security Game with Mend here