p PatchFirst

CVE-2026-28343

CVE-2026-28343 · CKEditor: Cross-site scripting (XSS) in the HTML Support package

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. Starting in version 29.0.0 and prior to version 47.6.0, a cross-site scripting (XSS) vulnerability has been discovered in the General HTML Support feature. This vulnerability could be triggered by inserting specially crafted markup, leading to unauthorized JavaScript code execution, if the editor instance used an unsafe General HTML Support configuration. This issue has been patched in version 47.6.0.

CVSS 6.4 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • ckeditor5

    Versions
    • >= 29.0.0, < 47.6.0: Affected

    No fix published

  • @ckeditor/ckeditor5-html-support npm

    Affected ranges
    • SEMVER: ≥ 29.0.0, < 47.6.0

    Update to 47.6.0

  • ckeditor5 npm

    Affected ranges
    • SEMVER: ≥ 29.0.0, < 47.6.0

    Update to 47.6.0

  • ckeditor Ubuntu:Pro:16.04:LTS

    Versions
    • 4.4.4+dfsg1-3
    • 4.5.6+dfsg-1
    • 4.5.7+dfsg-1
    • 4.5.7+dfsg-2
    • 4.5.7+dfsg-2ubuntu0.16.04.1~esm1
    • 4.5.7+dfsg-2ubuntu0.16.04.1~esm2
    • 4.5.7+dfsg-2ubuntu0.16.04.1~esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ldap-account-manager Ubuntu:16.04:LTS

    Versions
    • 4.9-1
    • 5.1-1
    • 5.2-1
    • 5.2-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • request-tracker4 Ubuntu:16.04:LTS

    Versions
    • 4.2.11-2
    • 4.2.12-3
    • 4.2.12-4
    • 4.2.12-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor Ubuntu:Pro:18.04:LTS

    Versions
    • 4.5.7+dfsg-2
    • 4.5.7+dfsg-2ubuntu0.18.04.1
    • 4.5.7+dfsg-2ubuntu0.18.04.1+esm1
    • 4.5.7+dfsg-2ubuntu0.18.04.1+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor3 Ubuntu:18.04:LTS

    Versions
    • 3.6.6.1+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ldap-account-manager Ubuntu:18.04:LTS

    Versions
    • 5.7-1
    • 6.1-1
    • 6.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • request-tracker4 Ubuntu:Pro:18.04:LTS

    Versions
    • 4.4.1-5
    • 4.4.2-1
    • 4.4.2-2
    • 4.4.2-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor Ubuntu:Pro:20.04:LTS

    Versions
    • 4.11.1+dfsg-1
    • 4.12.1+dfsg-1
    • 4.12.1+dfsg-1ubuntu0.1
    • 4.12.1+dfsg-1ubuntu0.1+esm1
    • 4.12.1+dfsg-1ubuntu0.1+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor3 Ubuntu:20.04:LTS

    Versions
    • 3.6.6.1+dfsg-3
    • 3.6.6.1+dfsg-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ldap-account-manager Ubuntu:20.04:LTS

    Versions
    • 6.7-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • request-tracker4 Ubuntu:20.04:LTS

    Versions
    • 4.4.3-2
    • 4.4.3-2+deb10u3build0.20.04.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor3 Ubuntu:22.04:LTS

    Versions
    • 3.6.6.1+dfsg-7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ldap-account-manager Ubuntu:22.04:LTS

    Versions
    • 7.5-1
    • 7.7-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • request-tracker4 Ubuntu:22.04:LTS

    Versions
    • 4.4.4+dfsg-2ubuntu1
    • 4.4.4+dfsg-2ubuntu1.22.04.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor Ubuntu:Pro:22.04:LTS

    Versions
    • 4.16.0+dfsg-2
    • 4.16.2+dfsg-1
    • 4.16.2+dfsg-1ubuntu0.1~esm1
    • 4.16.2+dfsg-1ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor3 Ubuntu:24.04:LTS

    Versions
    • 3.6.6.1+dfsg-7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ldap-account-manager Ubuntu:24.04:LTS

    Versions
    • 8.3-1
    • 8.5-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • request-tracker4 Ubuntu:24.04:LTS

    Versions
    • 4.4.4+dfsg-2ubuntu1
    • 4.4.4+dfsg-2ubuntu2
    • 4.4.7+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor Ubuntu:Pro:24.04:LTS

    Versions
    • 4.22.1+dfsg1-2
    • 4.22.1+dfsg1-2ubuntu0.24.04.1~esm1
    • 4.22.1+dfsg1-2ubuntu0.24.04.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ckeditor Ubuntu:25.10

    Versions
    • 4.22.1+dfsg1-2ubuntu1
    • 4.22.1+dfsg1-2ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ldap-account-manager Ubuntu:25.10

    Versions
    • 9.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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