CVE-2026-48949 MEDIUM

CVE-2026-48949: Joomla! Core - [20260703] - XSS in MFA method management

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

Lack of validation leads to an XSS vulnerability in the MFA management views.

Explanation of Vulnerability in Simple Terms

02Summary

Joomla! CMS versions 4.2.0 through 5.4.6 contain a cross-site scripting (XSS) vulnerability that allows high-privilege users to inject malicious scripts. An attacker with administrator or equivalent access can craft input that executes JavaScript in other users' browsers when they view affected pages. This requires user interaction—the victim must visit a page containing the injected payload.

What an attacker can do

03Attacker Capabilities

Inject JavaScript that runs in other users' browsers when they view affected pages.

Potential impact on your site

04Site Impact

A compromised admin account can steal session tokens, modify site content, or redirect users to malicious sites.

Conditions required to exploit

05Prerequisites

Attacker must have high-level privileges (administrator or equivalent) and the victim must visit a page with the malicious payload.

Key dates

06Disclosure timeline

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

Related vulnerabilities

08Related CVE

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