CVE-2025-23439 HIGH

CVE-2025-23439: WordPress TinyMCE Extended Config plugin <= 0.1.0 - Reflected Cross Site Scripting (XSS) vulnerability

Vendor Willshouse
Product TinyMCE Extended Config
Weakness CWE-79 · XSS
Published March 3, 2025
Last update May 12, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in willshouse TinyMCE Extended Config tinymce-extended-config allows Reflected XSS.This issue affects TinyMCE Extended Config: from n/a through <= 0.1.0.

Explanation of Vulnerability in Simple Terms

02Summary

TinyMCE Extended Config versions 0.1.0 and earlier contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts. An attacker can craft a malicious link or page that, when visited by a site administrator or user, executes arbitrary JavaScript in their browser. This can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim.

What an attacker can do

03Attacker Capabilities

Inject and execute malicious JavaScript in a user's browser when they visit a crafted page or click a malicious link.

Potential impact on your site

04Site Impact

Administrators and users can have their sessions hijacked, credentials stolen, or be tricked into performing unauthorized actions on the site.

Conditions required to exploit

05Prerequisites

The victim must visit a page containing the attacker's malicious payload or click a crafted link while logged in.

Key dates

06Disclosure timeline

March 3, 2025 CVE published
May 12, 2026 Record updated

Related vulnerabilities

08Related CVE