CVE-2026-90918

UNKNOWN 0.0

Joomla! Core - [20260908] - Core - XSS in HTML Mail Templates in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Joomla! Core - [20260908] - Core - XSS in HTML Mail Templates in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - The mail template feature lacks an escaping mechanism, causing XSS vectors in multiple extensions.

CWE	CWE-79
Vendor	joomla! project
Product	joomla! cms
Published	Sep 29, 2026

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Affected Versions

Joomla! Project / Joomla! CMS

4.0.0-5.4.8 6.0.0-6.1.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

joomla.org: https://www.joomla.org/ developer.joomla.org: https://developer.joomla.org/security-centre/1088-20260908-core-xss-in-html-mail-templates.html

Credits

Joe Grey / GitHub @StressTestor Joe Grey / GitHub @StressTestor