---
title: "[20190205] - Core - XSS Issue in core.js writeDynaList"
description: "We help designers, developers, hobbyists and business owners get the most out of the Joomla CMS.  Join us at our free monthly meetups, and let us help you with your Joomla projects."
url: "https://www.joomlalondon.co.uk/official-joomla-announcements/20190205-core-xss-issue-in-core-js-writedynalist"
date: "2026-09-09T15:23:56+00:00"
language: "en-GB"
---

#  \[20190205\] - Core - XSS Issue in core.js writeDynaList

- **Project:** Joomla!
- **SubProject:** CMS
- **Impact:** Low
- **Severity:** Low
- **Versions:** 2.5.0 through 3.9.2
- **Exploit type:** XSS
- **Reported Date:** 2018-October-07
- **Fixed Date:** 2019-February-12
- **CVE Number:** [CVE-2019-7740](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7740)

### Description

Inadequate parameter handling in JS code could lead to an XSS attack vector.

### Affected Installs

Joomla! CMS versions 2.5.0 through 3.9.2

### Solution

Upgrade to version 3.9.3

### Contact

The JSST at the [Joomla! Security Centre](https://developer.joomla.org/security-centre.html "Contact the JSST").

Dimitris GrammatikogiannisRead more  [http://feeds.joomla.org/~r/JoomlaSecurityNews/~3/RdrIyFYmwgI/769-20190205-core-xss-issue-in-core-js-writedynalist.html](http://feeds.joomla.org/~r/JoomlaSecurityNews/~3/RdrIyFYmwgI/769-20190205-core-xss-issue-in-core-js-writedynalist.html "[20190205] - Core - XSS Issue in core.js writeDyna")

## Schema

```json
{ "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Start", "item": "https://www.joomlalondon.co.uk" }, { "@type": "ListItem", "position": 2, "name": "Official Joomla! Announcements", "item": "https://www.joomlalondon.co.uk/official-joomla-announcements" }, { "@type": "ListItem", "position": 3, "name": "[20190205] - Core - XSS Issue in core.js writeDynaList", "item": "https://www.joomlalondon.co.uk/official-joomla-announcements/20190205-core-xss-issue-in-core-js-writedynalist" } ] }
```