Svelte is a UI framework known for its "disappearing" nature, meaning it shifts the workload from the browser to the compilation step, resulting in highly performant and smaller JavaScript bundles. Examining versions 1.41.2 and 1.41.1 reveals a tight iteration cycle, suggesting ongoing refinements and bug fixes. For developers, this continuous development indicates an active project with a responsive team addressing potential issues quickly.
While the core description, license, repository and author remain consistent between the two versions, the key difference lies in their release dates. Version 1.41.2 was released on October 28, 2017, just over a week after version 1.41.1, which was released on October 20, 2017. Although the provided metadata doesn't explicitly detail the specific changes included in version 1.41.2, the rapid release cycle strongly implies that it contains bug fixes, performance improvements, or minor feature enhancements over its predecessor. Developers should always prioritize using the latest stable version to benefit from these improvements and ensure they are working with the most up-to-date and reliable code.
The development dependencies listed for both versions are identical showing a consistent build and testing environment. These dependencies include tools like Rollup for bundling, ESLint for linting, and TypeScript for type checking, demonstrating a commitment to code quality and modern development practices. Before installing one of these older versions, developers should consider the current versions and if the upgrades include features or security improvements.
All the vulnerabilities related to the version 1.41.2 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