CVE-2026-92231

Medium

Description

Joomla! Core - [20260915] - Core - XSS filter bypass in InputFilter via HTML5 entity decode mismatch in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The checkAttribute method normalized an attribute value before testing it against the "javascript:" scheme regex, however without decoding HTML5 entities beforehand, causing an XSS vector.

SeverityMedium

CVSS6.7

Exploit probability—

Product

Joomla\!

PublishedSep 29, 2026

First seenSep 29, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

joomla joomla\!5.4.8, 6.1.3 or later

Vendor advisories

developer.joomla.org/security-centre/1095-20260915-core-xss-filter-bypass-in-inputfilter-via-html5-entity-decode-mismatch.html

Affected products

Product	Affected versions	Fixed in
joomla joomla\!	1.5.0 ≤ v < 5.4.8, 6.0.0 ≤ v < 6.1.3	5.4.8, 6.1.3

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