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    CVE-2026-90918

    Joomla! Core - [20260908] - Core - XSS in HTML Mail Templates in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - The mail template feature lacks an escaping mechanism, causing XSS vectors in multiple extensions.

    Published:Sep 29, 2026
    Last Modified:Oct 6, 2026
    EPS:Sep 29, 2026
    EPSS Score:0.00268
    CVSS Score:5.3

    Affected Products

    Vendor
    Joomla
    Product
    Joomla!
    Vendor
    Joomla
    Product
    Joomla\!

    Exploits

    No exploit reference

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High