CVE-2026-48952 MEDIUM

CVE-2026-48952: Joomla! Core - [20260706] - XSS in com_installer

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 escaping leads to an XSS vulnerability in the update list view of com_installer.

Explanation of Vulnerability in Simple Terms

02Summary

Joomla! CMS versions 4.0.0 through 5.4.6 contain a stored cross-site scripting (XSS) vulnerability. An authenticated administrator with high privileges can inject malicious scripts that execute in other users' browsers when they view affected content. The vulnerability requires user interaction—victims must visit a page containing the injected payload. This allows attackers to steal session tokens, perform actions on behalf of victims, or redirect users to malicious sites.

What an attacker can do

03Attacker Capabilities

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

Potential impact on your site

04Site Impact

Compromised admin accounts can inject persistent malicious code affecting all site visitors who view the affected content.

Conditions required to exploit

05Prerequisites

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

Key dates

06Disclosure timeline

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

Related vulnerabilities

08Related CVE

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