CVE-2025-63082 MEDIUM

CVE-2025-63082: Joomla! Core - [20260101] - Inadequate content filtering for data URLs

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 input filtering leads to an XSS vector in the HTML filter code related to data URLs in img tags.

Explanation of Vulnerability in Simple Terms

02Summary

Joomla CMS versions 4.0.0 through 5.4.1 contain a cross-site scripting (XSS) vulnerability that allows authenticated users with high privileges to inject malicious scripts. An attacker must have administrative access and trick a user into visiting a crafted page. The injected script executes in the victim's browser, potentially compromising their session or stealing sensitive data.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in a victim's browser when they visit a crafted page.

Potential impact on your site

04Site Impact

Compromised admin accounts could allow session hijacking or theft of sensitive site data through injected scripts.

Conditions required to exploit

05Prerequisites

Attacker must have high-level admin access and the victim must visit a page the attacker controls or crafts.

Key dates

06Disclosure timeline

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

Related vulnerabilities

08Related CVE

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