CVE-2026-48903
XSS in Joomla CMS Components
Publication date: 2026-05-26
Last updated on: 2026-05-26
Assigner: Joomla! Project
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| joomla | joomla_framework | From 3.0.0 (inc) to 5.4.6 (exc) |
| joomla | joomla_cms | From 3.0.0 (inc) to 5.4.6 (exc) |
| joomla | joomla_framework | From 6.0.0 (inc) to 6.1.1 (exc) |
| joomla | joomla_cms | From 6.0.0 (inc) to 6.1.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-48903 is a vulnerability found in the Joomla! Framework and CMS versions 3.0.0-5.4.5 and 6.0.0-6.1.0. It is caused by inadequate content filtering within the checkAttribute filter methods.
This flaw allows cross-site scripting (XSS) attacks in various components, meaning that malicious scripts can be injected and executed in the context of the affected web application.
How can this vulnerability impact me? :
The vulnerability can lead to cross-site scripting (XSS) attacks, which may allow attackers to execute malicious scripts in users' browsers.
- Steal sensitive information such as cookies or session tokens.
- Perform actions on behalf of the user without their consent.
- Compromise the integrity and security of the affected Joomla! website or application.
Users are advised to upgrade to Joomla! versions 5.4.6 or 6.1.1 to mitigate this risk.
What immediate steps should I take to mitigate this vulnerability?
To mitigate the CVE-2026-48903 vulnerability, users should upgrade their Joomla! Framework and CMS installations to versions 5.4.6 or 6.1.1 or later.
This update addresses the inadequate content filtering in the checkAttribute filter methods that leads to cross-site scripting (XSS) vulnerabilities.