CVE-2026-48952
Received Received - Intake

Cross-Site Scripting in Joomla Update List View

Publication date: 2026-07-07

Last updated on: 2026-07-07

Assigner: Joomla! Project

Description
Lack of escaping leads to an XSS vulnerability in the update list view of com_installer.

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Meta Information

Published
2026-07-07
Last Modified
2026-07-07
Generated
2026-07-08
AI Q&A
2026-07-07
EPSS Evaluated
N/A
NVD
CVE-2026-48952
EUVD
EUVD-2026-42070

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
joomla cms From 4.0.0 (inc) to 5.4.5 (inc)
joomla cms From 6.0.0 (inc) to 6.1.1 (inc)
joomla cms 5.4.7
joomla cms 6.1.2

Helpful Resources

Exploitability

CWE
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KEV
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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

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Executive Summary

CVE-2026-48952 is a Cross-Site Scripting (XSS) vulnerability in the Joomla! CMS. It occurs due to insufficient input escaping in the update list view of the com_installer component. This flaw allows attackers to inject and execute malicious scripts within the context of a user's browser.

Impact Analysis

This vulnerability can lead to the execution of malicious scripts in users' browsers, potentially allowing attackers to steal sensitive information, hijack user sessions, or perform unauthorized actions on behalf of the user. The severity is moderate with a low probability of exploitation, but it still poses a risk to Joomla! CMS users if not patched.

Detection Guidance

The vulnerability is a Cross-Site Scripting (XSS) issue in the update list view of the com_installer component in Joomla! CMS. Detection typically involves checking the Joomla! version and inspecting the update list view for unescaped input that could allow script execution.

Since the vulnerability affects Joomla! CMS versions 4.0.0 through 5.4.5 and 6.0.0 through 6.1.1, you can detect it by verifying the installed Joomla! version.

There are no specific commands provided in the resources for detecting this vulnerability on your network or system.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade Joomla! CMS to a patched version.

  • Upgrade to Joomla! CMS version 5.4.7 or later if you are on the 5.x branch.
  • Upgrade to Joomla! CMS version 6.1.2 or later if you are on the 6.x branch.

Contact the Joomla! Security Strike Team (JSST) at the Joomla! Security Centre for further assistance if needed.

Compliance Impact

The provided information does not specify how the XSS vulnerability in Joomla! CMS's com_installer component directly affects compliance with common standards and regulations such as GDPR or HIPAA.

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