CVE-2026-21632 - Vulnerability Details - OpenCVE

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

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00043.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Joomla! Project

Joomla! CMS

unaffected

Version	Status	Constraints
`4.0.0-5.4.3`	affected	—
`6.0.0-6.0.3`	affected	—

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://developer.joomla.org/security-centre/1030-20260304-core-xss-vectors-in-various-article-title-outputs.html

History

Wed, 01 Apr 2026 23:45:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Wed, 01 Apr 2026 09:45:00 +0000

Type	Values Removed	Values Added
Description		Lack of output escaping for article titles leads to XSS vectors in various locations.
Title		Joomla! Core - [20260304] - XSS vectors in various article title outputs
Weaknesses		CWE-79
References		https://developer.joomla.org/security-centre/1030-20260304-core-xss-vectors-in-various-article-title-outputs.html
Metrics		cvssV4_0 `{'score': 5.9, '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'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: Joomla

Published: 2026-04-01T09:03:11.213Z

Updated: 2026-04-02T05:09:54.642Z

Reserved: 2026-01-01T04:42:27.961Z

Link: CVE-2026-21632

Vulnrichment

Updated: 2026-04-01T12:57:58.226Z

NVD

Status : Undergoing Analysis

Published: 2026-04-01T10:16:16.250

Modified: 2026-04-01T14:23:37.727

Link: CVE-2026-21632

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-79

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