Joomla! XSS via InputFilter HTML5 entity decode mismatch (1.5.0-5.4.8,6.0.0-6.1.3)
CVE-2026-92231 Published on September 29, 2026
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
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.
Vulnerability Analysis
CVE-2026-92231 can be exploited with network access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-92231 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-92231
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Affected Versions
Joomla! Project Joomla! CMS:- Version 1.5.0-5.4.8 is affected.
- Version 6.0.0-6.1.3 is affected.
- Version 1.0.0-3.0.6 is affected.
- Version 4.0.0-4.1.0 is affected.