Vulnerability · Published May 28, 2026 · Assigned by GitHub_M
CVE-2026-47761TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` injection
High 8.7
In plain English
A high-severity cross-site scripting in tinymce from tinymce. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official 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 in the media plugin. Attackers can inject malicious scripts via crafted data-mce-* attributes, which are executed when content is rendered. Impacts users of TinyMCE with the media plugin enabled. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | tinymce | no fix listed | GHSA-vg35-5wq7-3x7w |
| NuGet | tinymce | 8.5.1 | GHSA-vg35-5wq7-3x7w |
| NuGet | tinymce | 7.9.3 | GHSA-vg35-5wq7-3x7w |
| Packagist | tinymce/tinymce | 8.5.1 | GHSA-vg35-5wq7-3x7w |
| Packagist | tinymce/tinymce | no fix listed | GHSA-vg35-5wq7-3x7w |
| Packagist | tinymce/tinymce | 7.9.3 | GHSA-vg35-5wq7-3x7w |
| npm | tinymce | no fix listed | GHSA-vg35-5wq7-3x7w |
| npm | tinymce | 8.5.1 | GHSA-vg35-5wq7-3x7w |
| npm | tinymce | 7.9.3 | GHSA-vg35-5wq7-3x7w |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
References
- https://github.com/tinymce/tinymce/security/advisories/GHSA-vg35-5wq7-3x7w x_refsource_CONFIRM
- https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview x_refsource_MISC
- https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview x_refsource_MISC