Svelte has a potential mXSS vulnerability due to improper HTML escaping

Description

A potential XSS vulnerability exists in Svelte for versions prior to 4.2.19.

Recommendation

Update the svelte package to the latest compatible version. Followings are version details:

• Affected version(s): < 4.2.19
• Patched version(s): 4.2.19

References

• GHSA-8266-84wp-wv5c
• CVE-2024-45047
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• Bootstrap Cross-Site Scripting (XSS) vulnerability for data-* attributes - CVE-2024-6485
• react-native-keys insecurely stores encryption cipher and Base64 chunks - CVE-2025-45001
• nuxt vulnerable to Cross-site Scripting in navigateTo if used after SSR - CVE-2024-34343
• Vega vulnerable to Cross-site Scripting via RegExp.prototype[@@replace] - CVE-2025-27793

Tags:

npm

svelte