DRUPAL-CONTRIB-2026-309

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    DRUPAL-CONTRIB-2026-309

    Published: 4 Nov 2026Last Modified: 4 Nov 2026

    Summary:

    Details: The Extended HTML Filter module allows using style attributes in CKEditor. The module XSS filter does not sufficiently sanitize certain HTMX attributes, which can lead to a cross-site scripting (XSS) vulnerability. The vulnerability is mitigated by the fact an attacker must be able to insert HTML with specific attributes.

    References: https://www.drupal.org/sa-contrib-2026-309

    Affected packages

    Package

    Name: drupal/extended_html_filter

    Purl: pkg:composer/drupal/extended_html_filter?repository_url=https:%2F%2Fpackages.drupal.org%2F8

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.0.4

    Affected versions

    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
    DRUPAL-CONTRIB-2026-309 | CVE-DB