Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-39h7-pwv7-rc3x
No affected components available
Impact
@excalidraw/excalidraw@0.18.0 depends on a Mermaid conversion package version that resolves to a Mermaid release affected by CVE-2025-54881 / GHSA-7rqq-prvp-x9jh. User-supplied Mermaid sequence diagram labels could trigger XSS through Mermaid’s KaTeX label rendering path.
This is patched in @excalidraw/excalidraw@0.18.1 by updating @excalidraw/mermaid-to-excalidraw to 2.2.2, which uses a patched Mermaid 11 release.
Moderate severity as this XSS requires manual user action - pasting unsafe Mermaid diagram into the Excalidraw editor. No semi-automated attack vector exists by default (such as accessing a link).
Patches
- Stable
@excalidraw/excalidraw@0.18.1is patched. - Unstable
@excalidraw/excalidraw@nexthas resolved to patched builds since@excalidraw/excalidraw@0.18.0-f29edfon 2025-08-21. - Direct consumers of
@excalidraw/mermaid-to-excalidrawshould use1.1.3or later.
Workarounds
None.
Resources
- Upstream Mermaid advisory: https://github.com/mermaid-js/mermaid/security/advisories/GHSA-7rqq-prvp-x9jh
- CVE-2025-54881
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard