CVE-2026-73336: Joomla! Core - [20260806] - XSS through schema.org outputs in Joomla 5.1.0-5.4.7, 6.0.0-6.1.2

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-10-22
Weakness: CWE-79

Description

Joomla! Core - [20260806] - XSS through schema.org outputs in Joomla 5.1.0-5.4.7, 6.0.0-6.1.2 - Improper escaping flags lead to an XSS vector in schema.org markup outputs.

Affected products

Joomla!: from 5.1.0 before 5.4.8; from 6.0.0 through 6.1.3 — fixed in 5.4.8

How to fix

Upgrade to a fixed version: Joomla! 5.4.8. Check the vendor advisory for mitigations.

References

https://developer.joomla.org/security-centre/1073-20260806-core-xss-through-schema-org-outputs.html
https://www.joomla.org/

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