CVE-2019-16725 Joomla! XSS in Default Templates
Attackers can execute arbitrary scripts via the logo parameter in default templates, potentially compromising user sessions.
- 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
- Available
What is CVE-2019-16725?
CVE-2019-16725 is a medium-severity cross-site scripting vulnerability in Joomla Joomla\!, published on 24 Sep 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
In Joomla! 3.x before 3.9.12, inadequate escaping allowed XSS attacks using the logo parameter of the default templates.
Weakness: CWE-79
Which versions are affected by CVE-2019-16725?
2 open source packages ship an affected version, including joomla/joomla-cms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla/joomla-cms Packagist | From 3.0.0 | 3.9.12 |
joomla/joomla-cms Packagist | From 3.0.0 | 3.9.12 |
Products include Joomla Joomla\!.
How do I fix CVE-2019-16725?
Upgrade joomla/joomla-cms to 3.9.12 or later.
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-2019-16725 being exploited?
There is no known exploitation of CVE-2019-16725 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-v84j-vh7x-g7j6.