CVE-2024-38356 — Vulnerability in tinymce — CVE Details

MEDIUM

TinyMCE Cross-Site Scripting (XSS) vulnerability using noneditable_regexp option

Published June 19, 2024Updated September 10, 2026Source: osv

Summary

### Impact A [cross-site scripting (XSS)](https://owasp.org/www-community/attacks/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. ### Patches 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. ### Fix To avoid this vulnerability: * Upgrade to TinyMCE 7.2.0 or higher. * Upgrade to TinyMCE 6.8.4 or higher for TinyMCE 6.x. * Upgrade to TinyMCE 5.11.0 LTS or higher for TinyMCE 5.x (only available as part of commercial [long-term support](https://www.tiny.cloud/long-term-support/) contract). ### References * [TinyMCE 6.8.4](https://www.tiny.cloud/docs/tinymce/6/6.8.4-release-notes/#overview) * [TinyMCE 7.2.0](https://www.tiny.cloud/docs/tinymce/7/7.2-release-notes/#overview) ### For more information If you have any questions or comments about this advisory: * Email us at [infosec@tiny.cloud](mailto:infosec@tiny.cloud) * Open an issue in the [TinyMCE repo](https://github.com/tinymce/tinymce/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc)

Advisory Timeline

First published June 19, 2024 (845 days ago).
Last revised September 10, 2026 — 813 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm

Update tinymce to 6.8.4 or later

npm install tinymce@6.8.4

npm

Update tinymce to 5.11.0 or later

npm install tinymce@5.11.0

Composer

Update tinymce/tinymce to 7.2.0 or later

composer require "tinymce/tinymce:^7.2.0"

npm

Update tinymce to 7.2.0 or later

npm install tinymce@7.2.0

NuGet

Update TinyMCE to 6.8.4 or later

dotnet add package TinyMCE --version 6.8.4

NuGet

Update TinyMCE to 5.11.0 or later

dotnet add package TinyMCE --version 5.11.0

pip

Update django-tinymce to 4.1.0 or later

pip install "django-tinymce>=4.1.0"

Composer

Update tinymce/tinymce to 6.8.4 or later

composer require "tinymce/tinymce:^6.8.4"

Composer

Update tinymce/tinymce to 5.11.0 or later

composer require "tinymce/tinymce:^5.11.0"

NuGet

Update TinyMCE to 7.2.0 or later

dotnet add package TinyMCE --version 7.2.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (10)

Affects 4 ecosystems: npm (1), nuget (1), packagist (1), pypi (1).

Package	Ecosystem	Affected	Fixed In
tinymce	npm	All versions	6.8.4
tinymce	npm	All versions	5.11.0
tinymce/tinymce	packagist	7.0.0, 7.0.1, 7.1.0, 7.1.1 (+1 more)	7.2.0
tinymce	npm	All versions	7.2.0
TinyMCE	nuget	6.0.0, 6.0.1, 6.0.2, 6.0.3 (+21 more)	6.8.4
TinyMCE	nuget	3.4.3.2, 3.4.4, 3.4.5, 3.4.7 (+178 more)	5.11.0
django-tinymce	pypi	1.0, 1.1, 1.2, 1.3 (+47 more)	4.1.0
tinymce/tinymce	packagist	6.0.0, 6.0.1, 6.0.2, 6.0.3 (+23 more)	6.8.4
tinymce/tinymce	packagist	4.0.0, 4.0.1, 4.0.10, 4.0.11 (+169 more)	5.11.0
TinyMCE	nuget	7.0.0, 7.0.1, 7.1.0, 7.1.1 (+1 more)	7.2.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-79
Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.1 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Frequently Asked Questions

What is CVE-2024-38356?: TinyMCE Cross-Site Scripting (XSS) vulnerability using noneditable_regexp option This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.1/10).
How do I check if my project is affected by CVE-2024-38356?: CVE-2024-38356 affects tinymce, tinymce/tinymce and TinyMCE (and 1 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2024-38356 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

6.1

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-9hcv-j9pv-qmph

PYSEC-2026-1301

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