TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments
### Impact Stored XSS vulnerability via forged mce:protected comments. Allows attackers to bypass sanitization and inject scripts that execute when content is restored. Impacts users who utilize the protect option. ### Patches Patched by validating decoded mce:protected content against configured protect regex rules before restoring. Users should upgrade to the latest patched version. ### Workarounds No official workaround available. ### Fix To avoid this vulnerability: Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial [long-term support](https://www.tiny.cloud/long-term-support/) contract). ### Acknowledgements Tiny thanks [Ivan Babenko](https://github.com/he1d3n) for their help identifying this vulnerability.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-47762US | medium5.4 | — | ||
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 forged mce:protected comments. Allows attackers to bypass san… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/tinymce/tinymcePACKAGE
- https://github.com/tinymce/tinymce/security/advisories/GHSA-v98h-vmpc-fpqvWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-47762ADVISORY
- https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overviewWEB
- https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overviewWEB
Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.
Free scan