CVE-2024-38357 TinyMCE Cross-Site Scripting (XSS) vulnerability using noscript elements
Attackers can execute malicious scripts via crafted noscript elements in TinyMCE, requiring users to upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-38357?
CVE-2024-38357 is a medium-severity cross-site scripting vulnerability in tinymce, published on 19 Jun 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
TinyMCE is an open source rich text editor. A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content parsing code. This allowed specially crafted noscript elements containing malicious code to be executed when that content was loaded into 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 content within noscript elements are properly parsed. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Weakness: CWE-79
Which versions are affected by CVE-2024-38357?
21 open source packages ship an affected version, including TinyMCE, tinymce/tinymce and django-tinymce.
| Package | Affected | Fixed in |
|---|---|---|
TinyMCE NuGet | All versions | 5.11.0 |
TinyMCE NuGet | All versions | 5.11.0 |
TinyMCE NuGet | From 6.0.0 | 6.8.4 |
TinyMCE NuGet | From 6.0.0 | 6.8.4 |
TinyMCE NuGet | From 7.0.0 | 7.2.0 |
TinyMCE NuGet | From 7.0.0 | 7.2.0 |
15 more packages
tinymce/tinymce Packagist | All versions | 5.11.0 |
tinymce/tinymce Packagist | All versions | 5.11.0 |
tinymce/tinymce Packagist | From 6.0.0 | 6.8.4 |
tinymce/tinymce Packagist | From 6.0.0 | 6.8.4 |
tinymce/tinymce Packagist | From 7.0.0 | 7.2.0 |
tinymce/tinymce Packagist | From 7.0.0 | 7.2.0 |
django-tinymce PyPI | All versions | 4.1.0 |
django-tinymce PyPI | All versions | 4.1.0 |
django-tinymce PyPI | All versions | 4.1.0 |
tinymce npm | All versions | 5.11.0 |
tinymce npm | All versions | 5.11.0 |
tinymce npm | From 6.0.0 | 6.8.4 |
tinymce npm | From 6.0.0 | 6.8.4 |
tinymce npm | From 7.0.0 | 7.2.0 |
tinymce npm | From 7.0.0 | 7.2.0 |
How do I fix CVE-2024-38357?
Upgrade TinyMCE to a fixed version for your release line: 5.11.0, 6.8.4 or 7.2.0.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-38357 being exploited?
There is no known exploitation of CVE-2024-38357 in the wild and no public exploit code.
Sources
Also known as GHSA-w9jx-4g6g-rp7x, PYSEC-2026-1302, UBUNTU-CVE-2024-38357.