CVE-2026-48905
XSS Vulnerability in Joomla Due to Insufficient HTML Filtering
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 | 5.4.6 |
| joomla | joomla | 6.1.1 |
| joomla | joomla | From 3.0.0|end_excluding=5.4.6 (inc) |
| joomla | joomla | From 6.0.0|end_excluding=6.1.1 (inc) |
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
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.
Can you explain this vulnerability to me?
CVE-2026-48905 is a security vulnerability in the Joomla! Framework and CMS versions 3.0.0-5.4.5 and 6.0.0-6.1.0. It arises from inadequate content filtering in the cleanAttributes filter code, which leads to insufficient input sanitization.
This lack of proper input filtering creates a cross-site scripting (XSS) attack vector, allowing attackers to inject malicious scripts into web pages viewed by other users.
How can this vulnerability impact me? :
This vulnerability can allow attackers to execute malicious scripts in the context of the affected Joomla! website, potentially leading to unauthorized actions such as session hijacking, defacement, or theft of sensitive information.
Because the vulnerability involves cross-site scripting (XSS), it can compromise user trust and the security of user data.
Users of affected Joomla! versions are advised to upgrade to 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-2026-48905 vulnerability, users should upgrade their Joomla! CMS to versions 5.4.6 or 6.1.1, where the issue has been fixed.
This vulnerability is due to inadequate content filtering in the cleanAttributes filter code, which allows cross-site scripting (XSS) attacks. Applying the update ensures proper input sanitization and prevents exploitation.