CVE-2023-48219

Special characters in unescaped text nodes can trigger mXSS in TinyMCE

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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.

TinyMCE es un editor de texto enriquecido de código abierto. Se descubrió una vulnerabilidad de Cross-Site Scripting (mXSS) de Mutación en la funcionalidad principal de deshacer/rehacer de TinyMCE y en otras API y complementos. Los nodos de texto dentro de padres específicos no tienen escape durante la serialización de acuerdo con el estándar HTML. Si dichos nodos de texto contienen un carácter especial reservado como marcador interno, se pueden combinar con otros patrones HTML para formar fragmentos maliciosos. Estos fragmentos pasan la capa de sanitización inicial cuando el contenido se analiza en el cuerpo del editor, pero pueden activar XSS cuando el marcador interno especial se elimina del contenido y se vuelve a analizar. Su vulnerabilidad ha sido parcheada en las versiones 6.7.3 y 5.10.9 de TinyMCE. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad.

*Credits: N/A

CVSS Scores

NISTv3.1 6.1

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-11-13 CVE Reserved
2023-11-15 CVE Published
2023-11-23 EPSS Updated
2024-08-29 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (3)

URL	Tag	Source
https://tiny.cloud/docs/release-notes/release-notes5109	Release Notes
https://tiny.cloud/docs/tinymce/6/6.7.3-release-notes	Release Notes

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://github.com/tinymce/tinymce/security/advisories/GHSA-v626-r774-j7f8	2023-11-22

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Tiny Search vendor "Tiny"		Tinymce Search vendor "Tiny" for product "Tinymce"				< 5.10.9 Search vendor "Tiny" for product "Tinymce" and version " < 5.10.9"		-		Affected
Tiny Search vendor "Tiny"		Tinymce Search vendor "Tiny" for product "Tinymce"				>= 6.0.0 < 6.7.3 Search vendor "Tiny" for product "Tinymce" and version " >= 6.0.0 < 6.7.3"		-		Affected