CVE-2025-63083 MEDIUM

CVE-2025-63083: Joomla! Core - [20260102] - XSS vector in the pagebreak plugin

Vendor Joomla! Project
Product Joomla! CMS
Weakness CWE-79 · XSS
Published January 6, 2026
Last update January 6, 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

Lack of output escaping leads to a XSS vector in the pagebreak plugin.

Explanation of Vulnerability in Simple Terms

02Summary

Joomla CMS versions 3.9.0 through 5.4.1 contain a cross-site scripting (XSS) vulnerability that allows authenticated administrators to inject malicious scripts. An attacker with high-level privileges can craft input that executes in other users' browsers when they view affected pages. This requires user interaction and affects data integrity.

What an attacker can do

03Attacker Capabilities

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

Potential impact on your site

04Site Impact

A compromised admin account can inject scripts affecting other users' sessions and data on your Joomla site.

Conditions required to exploit

05Prerequisites

Attacker must have high-level administrator privileges and the victim must view a page containing the injected payload.

Key dates

06Disclosure timeline

January 6, 2026 CVE published
January 6, 2026 Record updated

Related vulnerabilities

08Related CVE

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