CVE-2025-27109
Solid Lacks Escaping of HTML in JSX Fragments allows for Cross-Site Scripting (XSS)
7.3
HIGH
CVSS 3.1
EPSS 0.10%
Description
Inserts/JSX expressions inside illegal inlined JSX fragments lacked escaping, allowing user input to be rendered as HTML when put directly inside JSX fragments. For instance, `?text=<svg/onload=alert(1)>` would trigger XSS here. ```js const [text] = createResource(() => { return new URL(getRequestEvent().request.url).searchParams.get("text"); }); return ( <> Text: {text()} </> ); ```
How to fix CVE-2025-27109
To remediate CVE-2025-27109, upgrade the affected package to a fixed version below.
- —upgrade to 1.9.4 or later
Is CVE-2025-27109 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.9.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |