CVE-2022-25875: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

July 12, 2022 (updated July 19, 2022)

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

github.com/sveltejs/svelte/commit/f8605d6acbf66976da9b4547f76e90e163899907
github.com/sveltejs/svelte/pull/7530%23issuecomment-1158575990
nvd.nist.gov/vuln/detail/CVE-2022-25875
snyk.io/vuln/SNYK-JS-SVELTE-2931080

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