Is tinymce/tinymce 8.9 vulnerable?

Composer · 4 releases from 8.9.0 to 8.9.3 · latest tinymce/tinymce is 8.10.1 · checked 2 Nov 2026

No known advisories in the last release

tinymce/tinymce 8.9.3, the last 8.9 release, has no known advisories. 1 advisory affects earlier 8.9.x releases, so update to 8.9.3.

Update within 8.9:composer require tinymce/tinymce:^8.9.3

Is your project affected?

Private repo? Upload its lockfile instead, or connect GitHub to check every repo.

Fixed within 8.9.x, affecting earlier releases

  • HighCVE-2026-116675GHSA-mf2p-h6hf-fcwm27 Oct 2026

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

    Affected
    >=8.5.1 <8.9.3 · >=7.9.3 <7.9.4
    Fixed in
    7.9.4, 8.9.3

Which of your client projects are still on tinymce/tinymce 8.9?

NPMscan reads the lockfiles in every GitHub repo you pick, finds the exact tinymce/tinymce version each one installs, and checks it against these advisories. Each finding comes with the command that fixes it.

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Other tinymce/tinymce versions

Advisory data from OSV.dev (opens OSV.dev in a new tab), which includes the GitHub Advisory Database. Release list from the Composer registry. Refreshed daily.