[svelte] Svelte cross-site scripting prior to 3.49.0 due to when using objects during server-side rendering

The package svelte before 3.49.0 is vulnerable to Cross-site Scripting (XSS) due to improper input sanitization and to improper escape of attributes when using objects during SSR (Server-Side Rendering). Exploiting this vulnerability is possible via objects with a custom toString() function.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-25875
• https://github.com/sveltejs/svelte/commit/f8605d6acbf66976da9b4547f76e90e163899907
• https://snyk.io/vuln/SNYK-JS-SVELTE-2931080
• https://github.com/sveltejs/svelte/pull/7530#23issuecomment-1158575990
• https://github.com/advisories/GHSA-wv8q-r932-8hc7