CVE-2026-90918

EUVD-2026-89080
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 10.23%
Affected Products (NVD)
VendorProductVersion
joomlajoomla\!
4.0.0 ≤
𝑥
< 5.4.8
joomlajoomla\!
6.0.0 ≤
𝑥
< 6.1.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://developer.joomla.org/security-centre/1088-20260908-core-xss-in-html-mail-templates.html
https://www.joomla.org/