TinyMCE Cross-Site Scripting (XSS) vulnerability using noneditable_regexp option
Impact
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.
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 contract).
References
For more information
If you have any questions or comments about this advisory:
- Email us at infosec@tiny.cloud
- Open an issue in the TinyMCE repo
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | tinymce/tinymce | < 5.11.0, >= 6.0.0, < 6.8.4, >= 7.0.0, < 7.2.0 | 5.11.0, 6.8.4, 7.2.0 |
| npm package | tinymce | < 5.11.0, >= 6.0.0, < 6.8.4, >= 7.0.0, < 7.2.0 | 5.11.0, 6.8.4, 7.2.0 |
| .NET (NuGet) | TinyMCE | < 5.11.0, >= 6.0.0, < 6.8.4, >= 7.0.0, < 7.2.0 | 5.11.0, 6.8.4, 7.2.0 |
| Python (PyPI) | django-tinymce | < 4.1.0 | 4.1.0 |
References
- https://github.com/tinymce/tinymce/security/advisories/GHSA-9hcv-j9pv-qmph
- https://nvd.nist.gov/vuln/detail/CVE-2024-38356
- https://github.com/tinymce/tinymce/commit/5acb741665a98e83d62b91713c800abbff43b00d
- https://github.com/tinymce/tinymce/commit/a9fb858509f86dacfa8b01cfd34653b408983ac0
- https://github.com/tinymce/tinymce
- 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
- https://www.tiny.cloud/docs/tinymce/latest/7.2-release-notes/#overview
- https://pypi.org/project/django-tinymce
- https://github.com/advisories/GHSA-9hcv-j9pv-qmph
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Composer, npm, .NET (NuGet), Python (PyPI)
- Package
tinymce/tinymce, tinymce, TinyMCE- Disclosed
- 19.06.2024
- Updated
- 11.10.2026 13:18
Sources and licenses
OSV / GitHub Advisory Database - GHSA-9hcv-j9pv-qmph - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-1301 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: tinymce
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 20
- First → latest
- 01.2020 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 5
- Medium 14
- Low 1
Disclosures per year
- 2020: 3
- 2021: 5
- 2022: 1
- 2023: 3
- 2024: 4
- 2025: 0
- 2026: 4
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TinyMCE Cross-Site Scripting (XSS) vulnerability using noneditable_regexp option this entry
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