Description
TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability via unsanitized data-mce-* attributes (data-mce-href, data-mce-src, data-mce-style). Allows attackers to inject malicious values that override safe attributes during serialization, bypassing validation. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| tinymce | tinymce | < 5.11.1, >= 6.0.0, <= 6.8.6, >= 7.0.0, < 7.9.3, >= 8.0.0, < 8.5.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | tinymce | No fix yet | — |
| Ubuntu 18.04 LTS | tinymce | No fix yet | — |
| Ubuntu 16.04 LTS | tinymce | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | tinymce | <= 5.10.9 | — | GHSA-q742-qvgc-gc2f |
| npm | tinymce | >= 6.0.0, < 7.9.3 | 7.9.3 | GHSA-q742-qvgc-gc2f |
| npm | tinymce | >= 8.0.0, < 8.5.1 | 8.5.1 | GHSA-q742-qvgc-gc2f |
| NuGet | TinyMCE | <= 5.10.9 | — | GHSA-q742-qvgc-gc2f |
| NuGet | TinyMCE | >= 6.0.0, < 7.9.3 | 7.9.3 | GHSA-q742-qvgc-gc2f |
| NuGet | TinyMCE | >= 8.0.0, < 8.5.1 | 8.5.1 | GHSA-q742-qvgc-gc2f |
| Packagist | tinymce/tinymce | <= 5.10.9 | — | GHSA-q742-qvgc-gc2f |
| Packagist | tinymce/tinymce | >= 6.0.0, < 7.9.3 | 7.9.3 | GHSA-q742-qvgc-gc2f |
| Packagist | tinymce/tinymce | >= 8.0.0, < 8.5.1 | 8.5.1 | GHSA-q742-qvgc-gc2f |
Advisories 1
- WID-SEC-2026-3376 Atlassian Bamboo, Bitbucket, Confluence, Fisheye/Crucible, Jira Software und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026