CVE-2018-12711 Cross-site scripting in n/a
Attackers can execute arbitrary scripts in victims' browsers via unescaped HTML in the Joomla language switcher module.
- 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-2018-12711?
CVE-2018-12711 is a medium-severity cross-site scripting vulnerability in Joomla Joomla\!, published on 26 Jun 2018. 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 XSS issue was discovered in the language switcher module in Joomla! 1.6.0 through 3.8.8 before 3.8.9. In some cases, the link of the current language might contain unescaped HTML special characters. This may lead to reflective XSS via injection of arbitrary parameters and/or values on the current page URL.
Weakness: CWE-79
Which versions are affected by CVE-2018-12711?
It affects 1 product.
Products include Joomla Joomla\!.
How do I fix CVE-2018-12711?
No fix has been published for CVE-2018-12711 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-2018-12711 being exploited?
There is no known exploitation of CVE-2018-12711 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-wrjp-g4mp-gh85.