CVE-2019-9712 Cross-site scripting in n/a
An attacker can execute arbitrary scripts in the victim's browser via the Joomla com_config JSON handler due to lack of input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-9712?
CVE-2019-9712 is a medium-severity cross-site scripting vulnerability in Joomla Joomla\!, published on 12 Mar 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An issue was discovered in Joomla! before 3.9.4. The JSON handler in com_config lacks input validation, leading to XSS.
Weakness: CWE-79
Which versions are affected by CVE-2019-9712?
It affects 1 product.
Products include Joomla Joomla\!.
How do I fix CVE-2019-9712?
No fix has been published for CVE-2019-9712 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2019-9712 being exploited?
There is no known exploitation of CVE-2019-9712 in the wild and no public exploit code.
Other vulnerabilities in Joomla Joomla\!
- CVE-2016-10033 PHPMailer Command Injection
- CVE-2023-23752 Joomla! Improper Access Control
- CVE-2026-48902 Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links
- CVE-2025-25226 [20250401] - Joomla Framework - SQL injection vulnerability in quoteNameStr method of Database package
- CVE-2022-23795 [20220303] - Core - User row are not bound to a authentication mechanism
Sources
Also known as GHSA-w97r-4fr8-r76p.