CVE-2026-92231

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

State: Published
Severity: 7.1 High
Published: Sep 29, 2026
Updated: Sep 30, 2026
Reserved: Sep 15, 2026

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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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	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:P	Joomla

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Joomla! CMSJoomla! Project	1.5.0-5.4.8Affected 6.0.0-6.1.3Affected
Joomla! Framework Filter packageJoomla! Project	1.0.0-3.0.6Affected 4.0.0-4.1.0Affected

References

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