CVE-2011-4909 Cross-site scripting in n/a
Remote attackers can inject arbitrary web script or HTML via the HTTP_REFERER header, potentially leading to session hijacking or malicious actions.
- 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-2011-4909?
CVE-2011-4909 is a medium-severity cross-site scripting vulnerability in Joomla Joomla\!, published on 7 Oct 2012. 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
Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.5.12 allow remote attackers to inject arbitrary web script or HTML via the HTTP_REFERER header to (1) components/com_content/views/article/tmpl/form.php, (2) components/com_user/controller.php, (3) plugins/system/legacy/html.php, or (4) templates/beez/html/com_content/article/form.php.
Weakness: CWE-79
Which versions are affected by CVE-2011-4909?
It affects 1 product.
Products include Joomla Joomla\!.
How do I fix CVE-2011-4909?
No fix has been published for CVE-2011-4909 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-2011-4909 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-4909 exists.
Public exploit code: 1 Exploit-DB entry.
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-jmmr-9v33-pfw8.