Solid Lacks Escaping of HTML in JSX Fragments allows for Cross-Site Scripting (XSS)

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.

Recommendation

Update the solid-js package to the latest compatible version. Followings are version details:

• Affected version(s): < 1.9.4
• Patched version(s): 1.9.4

References

• GHSA-3qxh-p7jc-5xh6
• CVE-2025-27109
• CWE-116
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• @plone/volto vulnerable to potential DoS by invoking specific URL by anonymous user - CVE-2025-61668
• @workos-inc/authkit-nextjs refresh tokens are logged when the debug flag is enabled - CVE-2024-51752
• Webpack's AutoPublicPathRuntimeModule has a DOM Clobbering Gadget that leads to XSS - CVE-2024-43788
• @fastify/oauth2 vulnerable to Cross Site Request Forgery due to reused Oauth2 state - CVE-2023-31999

Tags:

npm

solid-js