DRUPAL-CORE-2021-003

    Dashboard / Vulnerabilities / DRUPAL-CORE-2021-003

    DRUPAL-CORE-2021-003

    Published: 26 May 2021Last Modified: 10 Dec 2025

    Summary:

    Details: **Update: 2021-06-11: Added CVE-2021-33829 identifier** Drupal core uses the third-party CKEditor library. This library has an error in parsing HTML that could lead to an XSS attack. CKEditor 4.16.1 and later include the fix. Update: 2021-06-11: More details are available on [CKEditor's blog](https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser). Users of the CKEditor library via means other than Drupal core should update their 3rd party code (e.g. the WYSIWYG module for Drupal 7). The Drupal Security Team policy is not to alert for issues affecting 3rd party libraries unless those are shipped with Drupal core. See [DRUPAL-SA-PSA-2016-004 for more details](https://www.drupal.org/psa-2016-004). This issue is mitigated by the fact that it only affects sites with CKEditor enabled.

    References: https://www.drupal.org/sa-core-2021-003

    Affected packages

    Package

    Name: drupal/core

    Purl: pkg:composer/drupal/core

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 8.0.0
    Fixed -8.9.16

    Affected versions

    8.0.0
    8.0.1
    8.0.2
    8.0.3
    8.0.4
    8.0.5
    8.0.6

    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-CORE-2021-003 | CVE-DB