CVE-2026-48954 MEDIUM

CVE-2026-48954: Joomla! Core - [20260708] - XSS through language overrides

Vendor Joomla! Project
Product Joomla! CMS
Weakness CWE-79 · XSS
Published July 7, 2026
Last update July 8, 2026
View on NVD All CVEs

CVSS base score

5.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

Improper validation leads to a generic XSS vector in the language override feature.

Explanation of Vulnerability in Simple Terms

02Summary

Joomla! CMS versions 3.0.0 through 5.4.6 contain a stored cross-site scripting (XSS) vulnerability. An authenticated administrator can inject malicious scripts that execute in other users' browsers when they view affected content. The vulnerability requires high-level privileges and user interaction to exploit, limiting its scope to administrative misuse or compromise.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers when they view the affected content.

Potential impact on your site

04Site Impact

A compromised admin account can inject persistent malicious code affecting all site visitors who view the targeted content.

Conditions required to exploit

05Prerequisites

Attacker must have administrator-level access to Joomla and the victim must view the affected page.

Key dates

06Disclosure timeline

July 7, 2026 CVE published
July 8, 2026 Record updated

Related vulnerabilities

08Related CVE

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