---
title: "[20190602] - Core - XSS in subform field"
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/20190602-core-xss-in-subform-field"
date: "2026-09-09T17:14:03+00:00"
language: "en-GB"
---

#  \[20190602\] - Core - XSS in subform field

- **Project:** Joomla!
- **SubProject:** CMS
- **Impact:** Moderate
- **Severity:** Low
- **Versions:** 3.6.0 through 3.9.6
- **Exploit type:** XSS
- **Reported Date:** 2019-January-01
- **Fixed Date:** 2019-June-11
- **CVE Number:** [CVE-2019-12766](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12766)

### Description

The subform fieldtype does not sufficiently filter or validate input of subfields, this leads to XSS attack vectors.

### Affected Installs

Joomla! CMS versions 3.6.0 through 3.9.6

### Solution

Upgrade to version 3.9.7

### Contact

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

**Reported By:** Volkmar Schlothauer, ghsvs.deRead more  [http://feeds.joomla.org/~r/JoomlaSecurityNews/~3/pYcjfxwUS9o/784-20190602-core-xss-in-subform-field.html](http://feeds.joomla.org/~r/JoomlaSecurityNews/~3/pYcjfxwUS9o/784-20190602-core-xss-in-subform-field.html "[20190602] - Core - XSS in subform field")

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