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 - 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.

Score

CVSS 4.0 7.1 High

Status

Analyzed - security@joomla.org

Published

2026-09-29

Last modified

2026-10-06

Weaknesses

CWE-79

Affected products

• Joomla! (Joomla)
• Joomla Cms (Joomla Project)
• Joomla Framework Filter Package (Joomla Project)

References

• https://www.joomla.org/
• https://developer.joomla.org/security-centre/1095-20260915-core-xss-filter-bypass-in-inputfilter-via-html5-entity-decod…