Special characters in unescaped text nodes can trigger mXSS in TinyMCE
Description
TinyMCE is an open source rich text editor. A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCE’s core undo/redo functionality and other APIs and plugins. Text nodes within specific parents are not escaped upon serialization according to the HTML standard. If such text nodes contain a special character reserved as an internal marker, they can be combined with other HTML patterns to form malicious snippets. These snippets pass the initial sanitisation layer when the content is parsed into the editor body, but can trigger XSS when the special internal marker is removed from the content and re-parsed. his vulnerability has been patched in TinyMCE versions 6.7.3 and 5.10.9. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
tinymcenpm | < 5.10.9 | 5.10.9 |
tinymcenpm | >= 6.0.0, < 6.7.3 | 6.7.3 |
tinymce/tinymcePackagist | < 5.10.9 | 5.10.9 |
tinymce/tinymcePackagist | >= 6.0.0, < 6.7.3 | 6.7.3 |
TinyMCENuGet | < 5.10.9 | 5.10.9 |
TinyMCENuGet | >= 6.0.0, < 6.7.3 | 6.7.3 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
9- github.com/advisories/GHSA-v626-r774-j7f8ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2023-48219ghsaADVISORY
- github.com/tinymce/tinymce/releases/tag/5.10.9ghsaWEB
- github.com/tinymce/tinymce/releases/tag/6.7.3ghsaWEB
- github.com/tinymce/tinymce/security/advisories/GHSA-v626-r774-j7f8ghsax_refsource_CONFIRMWEB
- tiny.cloud/docs/release-notes/release-notes5109ghsaWEB
- tiny.cloud/docs/release-notes/release-notes5109/mitrex_refsource_MISC
- tiny.cloud/docs/tinymce/6/6.7.3-release-notesghsaWEB
- tiny.cloud/docs/tinymce/6/6.7.3-release-notes/mitrex_refsource_MISC
News mentions
0No linked articles in our index yet.