CVE-2026-116675
TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization
- State
- Published
- Severity
- 8.5 High
- Published
- Oct 27, 2026
- Updated
- Oct 28, 2026
- Reserved
- Oct 26, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.5 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
tinymcetinymce |
|
References
- https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm
- https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2
- https://github.com/tinymce/tinymce/releases/tag/8.9.3
- https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview
- https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview
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