CVE-2026-21632 PUBLISHED

Joomla! Core - [20260304] - XSS vectors in various article title outputs

Assigner: Joomla
Reserved: 01.01.2026 Published: 01.04.2026 Updated: 01.04.2026

Lack of output escaping for article titles leads to XSS vectors in various locations.

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
CVSS Score: 5.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	High
User Interaction	Passive

CVSS 4.0

Vendor	Joomla! Project
Product	Joomla! CMS
Versions	Default: unaffected Version 4.0.0-5.4.3 is affected Version 6.0.0-6.0.3 is affected

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE