CVE-2026-48951

Analyzed Analyzed - Analysis Complete

XSS in Joomla Modalreturn Layout Components

Publication date: 2026-07-07

Last updated on: 2026-07-09

Assigner: Joomla! Project

Description

Lack of escaping leads to XSS vulnerabilities in modalreturn layouts of various components.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-07

Last Modified

2026-07-09

Generated

2026-07-16

AI Q&A

2026-07-07

EPSS Evaluated

2026-07-14

NVD

CVE-2026-48951

EUVD

EUVD-2026-42063

Affected Vendors & Products

Vendor	Product	Version / Range
joomla	joomla!	From 6.0.0 (inc) to 6.1.2 (exc)
joomla	joomla!	From 4.0.0 (inc) to 5.4.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

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

Mitigation Strategies

To mitigate the CVE-2026-48951 vulnerability, users should upgrade Joomla! CMS to the patched versions 5.4.7 or 6.1.2, where the issue has been fixed.

This vulnerability arises from insufficient escaping in modalreturn layouts across multiple components, allowing Cross-Site Scripting (XSS) attacks.

Upgrading to the fixed versions is the recommended immediate step to prevent exploitation.

Impact Analysis

This vulnerability can allow attackers to execute malicious scripts in the context of the affected Joomla! CMS site. This can lead to unauthorized actions such as stealing user credentials, session hijacking, defacement of the website, or delivering malware to users.

Executive Summary

CVE-2026-48951 is a Cross-Site Scripting (XSS) vulnerability found in Joomla! CMS versions 4.0.0 through 5.4.5 and 6.0.0 through 6.1.1. It occurs due to insufficient escaping in modalreturn layouts across various components, which allows attackers to inject malicious scripts into the application.

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