Stored Cross-site Scripting (XSS) in excalidraw's web embed component
Summary
A stored XSS vulnerability in Excalidraw's web embeddable component. This allows arbitrary JavaScript to be run in the context of the domain where the editor is hosted.
Poc
Inserting an embed with the below url (can be copy/pasted onto canvas to insert as embed) will log 42 to the console:
https://gist.github.com/vv=v<script>console.log(42)</script>Details
There were two vectors. One rendering untrusted string as iframe's srcdoc without properly sanitizing against HTML injection. Second by improperly sanitizing against attribute HTML injection. This in conjunction with allowing allow-same-origin sandbox flag (necessary for several embeds) resulted in the XSS.
Former was fixed by no longer rendering unsafe srcdoc content verbatim, and instead strictly parsing the supplied content and constructing the srcdoc manually. The latter by sanitizing properly.
The allow-same-origin flag is now also set only in cases that require it, following the principle of least privilege.
Impact
This is a cross site scripting vulnerability, for more information, please see: https://portswigger.net/web-security/cross-site-scripting
Two npm @excalidraw/excalidraw stable version releases were affected (0.16.x, 0.17.x), and both are now patched.
Software afectado
Haz clic en una tecnología para ver todas sus vulnerabilidades.
| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | @excalidraw/excalidraw | >= 0.16.0, < 0.16.4, >= 0.17.0, < 0.17.6 | 0.16.4, 0.17.6 |
Referencias
- https://github.com/excalidraw/excalidraw/security/advisories/GHSA-m64q-4jqh-f72f
- https://nvd.nist.gov/vuln/detail/CVE-2024-32472
- https://github.com/excalidraw/excalidraw/commit/6be752e1b6d776ccfbd3bb9eea17463cb264121d
- https://github.com/excalidraw/excalidraw/commit/988f81911ca58e3ca2583e0dd44a954dd00e09d0
- https://github.com/excalidraw/excalidraw
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Debilidad (CWE)
CWE-79- Plataforma
- npm
- Paquete
@excalidraw/excalidraw- Publicada
- 17.04.2024
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-m64q-4jqh-f72f - CC BY 4.0
Historial de vulnerabilidades: @excalidraw/excalidraw
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 3
- Primera → última
- 08.2023 04.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Media 3
Divulgaciones por año
- 2023: 1
- 2024: 1
- 2025: 0
- 2026: 1
-
Stored Cross-site Scripting (XSS) in excalidraw's web embed component esta entrada
Identifica las vulnerabilidades de tu aplicación
Con la integración de DockRay y el inventario de software activado, DockRay compara las versiones notificadas de los componentes con las vulnerabilidades conocidas y avisa de las coincidencias confirmadas. La cobertura depende de la tecnología compatible y de los avisos disponibles.