Svelte 1.0.7 represents a minor version update over its predecessor, Svelte 1.0.6, within the burgeoning Svelte framework ecosystem. Both versions share the common goal of providing a "magical disappearing UI framework," emphasizing compile-time transformations for enhanced performance and a minimalist approach to front-end development. Examining the package.json files reveals that the core development dependencies remain consistent between versions, indicating a focus on stability and iterative improvements rather than radical changes. Developers relying on tools like Rollup, ESLint, Mocha, and Babel for building, linting, testing, and transpiling their Svelte components can expect familiar workflows. The shared dependencies on libraries such as magic-string and estree-walker also highlight Svelte's commitment to source code manipulation and abstract syntax tree traversal, core aspects of its compilation process.
The key difference lies in the releaseDate. Svelte 1.0.7 was released approximately 12 minutes after 1.0.6, suggesting a hotfix or a very minor adjustment addressed promptly. While the exact nature of this potential fix is not evident from the metadata, developers moving from Svelte 1.0.6 to 1.0.7 can anticipate improvements in stability or edge-case handling. For those new to Svelte, both versions represent early iterations of a framework pioneering the concept of component compilation. Svelte efficiently converts your declarative code into highly optimized JavaScript that manipulates the DOM directly. By removing the virtual DOM overhead, Svelte applications often achieve impressive performance characteristics. The consistent development environment fostered by shared dependencies ensures a smooth transition for upgrading projects or onboarding new developers.
All the vulnerabilities related to the version 1.0.7 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