CVE-2023-48219 json
Special characters in unescaped text nodes can trigger mXSS in TinyMCE
published 2023-11-15 2 y ago modified 2026-09-10 1 mo ago also GHSA-v626-r774-j7f8 , EUVD-2023-3037
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm tinymce 5.10.9, 6.7.3
- packagist tinymce/tinymce 5.10.9, 6.7.3
- nuget TinyMCE 5.10.9, 6.7.3
- tiny tinymce 5.10.9, 6.7.3
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.71% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | tinymce | <5.10.9 >=6.0.0, <6.7.3 |
5.10.9 6.7.3 |
| packagist | tinymce/tinymce | <5.10.9 >=6.0.0, <6.7.3 |
5.10.9 6.7.3 |
| nuget | TinyMCE | <5.10.9 >=6.0.0, <6.7.3 |
5.10.9 6.7.3 |
Affected products
- tinymce tinymce
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/tinymce/tinymce/security/advisories/GHSA-v626-r774-j7f8
web, vendor-advisory
-
tiny.cloud
/docs/release-notes/release-notes5109/
release-notes
-
tiny.cloud
/docs/tinymce/6/6.7.3-release-notes/
release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2023-48219
advisory
-
github.com
/tinymce/tinymce
package
-
github.com
/tinymce/tinymce/releases/tag/5.10.9
web
-
github.com
/tinymce/tinymce/releases/tag/6.7.3
web
-
tiny.cloud
/docs/release-notes/release-notes5109
web
-
tiny.cloud
/docs/tinymce/6/6.7.3-release-notes
web
Sources
- CVE List CVE-2023-48219
- GitHub Advisory GHSA-v626-r774-j7f8
- NVD CVE-2023-48219
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