CVE-2026-48903 MEDIUM

CVE-2026-48903: Joomla! Framework - [20260519] - Inadequate content filtering within the checkAttribute filter code.

Vendor Joomla! Project
Product Joomla! Framework Filter package
Weakness CWE-79 · XSS
Published May 26, 2026
Last update May 27, 2026
View on NVD All CVEs

CVSS base score

6.9/10
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:L/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Inadequate content filtering within the checkAttribute methods leads to XSS vulnerabilities in various components.

Explanation of Vulnerability in Simple Terms

02Summary

The Joomla! Framework Filter package contains a cross-site scripting (XSS) vulnerability in versions 1.0.0 through 3.0.5. An authenticated administrator with high privileges can inject malicious scripts that execute in other users' browsers when they interact with affected pages. The vulnerability requires user interaction to trigger. Sites running the affected versions should update to a patched release.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers when they visit affected pages.

Potential impact on your site

04Site Impact

Administrators with high privileges can inject scripts affecting other users; update the Joomla! Framework Filter package to mitigate.

Conditions required to exploit

05Prerequisites

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

Key dates

06Disclosure timeline

May 26, 2026 CVE published
May 27, 2026 Record updated

Related vulnerabilities

08Related CVE

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