Svelte version 3.41.0 introduces subtle refinements for developers building cybernetically enhanced web applications. Compared to the preceding stable version 3.40.3, the core functionality remains consistent, indicated by the matching description field. The devDependencies also remain largely static, featuring a comprehensive suite of tools crucial for development, testing, and linting, including Rollup, TypeScript, ESLint, and various plugins facilitating seamless integration and code quality. Both versions underscore Svelte's commitment to a robust developer experience.
The most notable difference lies in the dist object. Version 3.41.0 exhibits a slightly larger unpackedSize of 6911929 bytes compared to 3.40.3's 6884718 bytes, suggesting minor enhancements or bug fixes within the core library. Additionally the date, releaseDate, differs. This indicates a newer build incorporating the latest adjustments.
For developers, this signifies a commitment to ongoing improvements and refinements within the Svelte ecosystem. While the feature set might not be drastically different, upgrading to 3.41.0 ensures access to the most current optimizations and potential bug resolutions, leading to a potentially smoother and more efficient development workflow. Reviewing the detailed changelog corresponding to this release is highly recommended to understand the specific nuances and improvements implemented. These iterative updates solidify Svelte's position as a forward-thinking framework for modern web development.
All the vulnerabilities related to the version 3.41.0 of the package
Svelte vulnerable to XSS 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.
Svelte has a potential mXSS vulnerability due to improper HTML escaping
A potential XSS vulnerability exists in Svelte for versions prior to 4.2.19.
Svelte improperly escapes HTML on server-side rendering. It converts strings according to the following rules:
" -> "& -> &< -> <& -> &The assumption is that attributes will always stay as such, but in some situation the final DOM tree rendered on browsers is different from what Svelte expects on server-side rendering. This may be leveraged to perform XSS attacks. More specifically, this can occur when injecting malicious content into an attribute within a <noscript> tag.
A vulnerable page (+page.svelte):
<script>
import { page } from "$app/stores"
// user input
let href = $page.url.searchParams.get("href") ?? "https://example.com";
</script>
<noscript>
<a href={href}>test</a>
</noscript>
If a user accesses the following URL,
http://localhost:4173/?href=</noscript><script>alert(123)</script>
then, alert(123) will be executed.
XSS, when using an attribute within a noscript tag