Description
excalidraw is an open source virtual hand-drawn style whiteboard. 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. 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. This vulnerability is fixed in 0.17.6 and 0.16.4.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/excalidraw/excalidraw/security/advisories/GHSA-m64q-4jqh-f72f
Patch x_refsource_misc
https://github.com/excalidraw/excalidraw/commit/6be752e1b6d776ccfbd3bb9eea17463cb264121d
Scores
CVSS v3
6.1
EPSS
0.0024
EPSS Percentile
47.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
CWE-80
Status
published
Products (3)
excalidraw/excalidraw
0.16.0 - 0.16.4npm
excalidraw/excalidraw
>= 0.17.0, <0.17.6
excalidraw/excalidraw
>=0.16.0, <0.16.4
Published
Apr 17, 2024
Tracked Since
Feb 18, 2026