CVE-2024-38356: 
JavaScript vulnerability analysis and mitigation

A cross-site scripting (XSS) vulnerability was discovered in TinyMCE's content extraction code. When using the noneditable_regexp option, specially crafted HTML attributes containing malicious code were able to be executed when content was extracted from the editor (Tiny Docs, GitHub Advisory).

The vulnerability occurs when using the noneditable_regexp option in TinyMCE, where content within an attribute was not properly verified to match the configured regular expression before being added. This allowed attackers to inject and execute malicious JavaScript code through specially crafted HTML attributes (GitHub Advisory). The vulnerability has been assigned a CVSS v3.1 base score of 6.1 (Moderate) with vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N (GitHub Advisory).

The vulnerability could allow attackers to execute arbitrary JavaScript code within the context of the editor when content is extracted. This could potentially lead to unauthorized access to sensitive information or manipulation of editor content (OWASP XSS).

The vulnerability has been patched in TinyMCE versions 7.2.0, 6.8.4, and 5.11.0 LTS. Users are advised to upgrade to these versions or later. The fix ensures that any content within an attribute is properly verified to match the configured regular expression before being added (Tiny Docs).