p PatchFirst

CVE-2026-116675

CVE-2026-116675 · TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization

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

TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.

CVSS 8.5 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: system · php · node

Affected products and versions

  • tinymce

    Versions
    • >= 8.5.1, < 8.9.3: Affected
    • >= 7.9.3, < 7.9.4: Affected

    No fix published

  • tinymce npm

    Affected ranges
    • SEMVER: ≥ 8.5.1, < 8.9.3

    Update to 8.9.3

  • tinymce NuGet

    Versions
    • 8.5.1
    • 8.6.0
    • 8.7.0
    • 8.8.0
    • 8.8.1
    • 8.8.2
    • 8.9.0
    • 8.9.1
    • 8.9.2
    Affected ranges
    • ECOSYSTEM: ≥ 8.5.1, < 8.9.3

    Update to 8.9.3

  • tinymce/tinymce Packagist

    Versions
    • 8.5.1
    • 8.6.0
    • 8.7.0
    • 8.8.0
    • 8.8.1
    • 8.8.2
    • 8.9.0
    • 8.9.1
    • 8.9.2
    Affected ranges
    • ECOSYSTEM: ≥ 8.5.1, < 8.9.3

    Update to 8.9.3

  • tinymce npm

    Versions
    • 7.9.3
    Affected ranges
    • SEMVER: ≥ 7.9.3, < 7.9.4

    Update to 7.9.4

  • tinymce NuGet

    Versions
    • 7.9.3
    Affected ranges
    • ECOSYSTEM: ≥ 7.9.3, < 7.9.4

    Update to 7.9.4

  • tinymce/tinymce Packagist

    Versions
    • 7.9.3
    Affected ranges
    • ECOSYSTEM: ≥ 7.9.3, < 7.9.4

    Update to 7.9.4

  • tinymce Ubuntu:16.04:LTS

    Versions
    • 3.4.8+dfsg0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • tinymce Ubuntu:18.04:LTS

    Versions
    • 3.4.8+dfsg0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • tinymce Ubuntu:20.04:LTS

    Versions
    • 3.4.8+dfsg0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →