CVE-2018-11326: An issue was discovered in Joomla!

Security readout for executives and security teams

CVE-2018-11326 is a Joomla Core cross-site scripting issue fixed before version 3.8.8. Weak input filtering could let malicious script run in a user's browser, including scenarios involving default Administrator filtering settings. The main business risk is site integrity, admin session exposure, and user trust loss on unpatched Joomla sites. Exposure is likely limited to organizations running Joomla Core versions earlier than 3.8.8, especially sites with administrative users and default filtering settings. The source bundle does not identify specific vulnerable components, configurations, or CPEs. Treat as a moderate remediation item for any remaining legacy Joomla estate. It is not marked as actively exploited in the supplied data, but XSS in a CMS can affect administrative trust boundaries and public site integrity. Mitigation focus: Inventory Joomla sites and identify Core versions earlier than 3.8.8.; Upgrade affected Joomla Core installations to 3.8.8 or later per vendor guidance.; Review Joomla administrator filtering settings against the vendor advisory..

Prepared

Jun 7, 2026, 13:21 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.