GHSA-m64q-4jqh-f72f
Suggest an improvement- Source
- https://github.com/advisories/GHSA-m64q-4jqh-f72f
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/04/GHSA-m64q-4jqh-f72f/GHSA-m64q-4jqh-f72f.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-m64q-4jqh-f72f
- Aliases
- Related
- Published
- 2024-04-17T21:32:57Z
- Modified
- 2024-04-18T00:31:04Z
- Severity
-
- 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- Stored Cross-site Scripting (XSS) in excalidraw's web embed component
- Details
-
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
42to 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
srcdocwithout properly sanitizing against HTML injection. Second by improperly sanitizing against attribute HTML injection. This in conjunction with allowingallow-same-originsandbox flag (necessary for several embeds) resulted in the XSS.Former was fixed by no longer rendering unsafe
srcdoccontent verbatim, and instead strictly parsing the supplied content and constructing thesrcdocmanually. The latter by sanitizing properly.The
allow-same-originflag 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/excalidrawstable version releases were affected (0.16.x,0.17.x), and both are now patched. - Database specific
{ "nvd_published_at": "2024-04-17T22:15:08Z", "cwe_ids": [ "CWE-79" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2024-04-17T21:32:57Z" }- References
-
- 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
Affected packages
npm / @excalidraw/excalidraw
Package
- Name
- @excalidraw/excalidraw
- View open source insights on deps.dev
- Purl
- pkg:npm/%40excalidraw/excalidraw
npm / @excalidraw/excalidraw
Package
- Name
- @excalidraw/excalidraw
- View open source insights on deps.dev
- Purl
- pkg:npm/%40excalidraw/excalidraw