Svelte version 1.6.8 represents a subtle but potentially important update to the magical disappearing UI framework, following closely on the heels of version 1.6.7. Both versions share the same core description, highlighting Svelte's key characteristic: its ability to compile away into highly optimized vanilla JavaScript at build time, resulting in incredibly fast and efficient applications. The dependencies remain consistent, with magic-string at ^0.19.0 retained for efficient code manipulation. The developer dependencies, crucial for building and testing Svelte itself, are also identical, indicating no shifts in the development workflow or tooling between these two releases. This includes tools like Rollup for bundling, ESLint for linting, and Mocha for testing, creating a familiar environment for contributors.
The primary difference lies in the release date. Version 1.6.8 was released on February 1st, 2017, a week after version 1.6.7's release on January 25th, 2017. This short interval suggests that version 1.6.8 likely contains bug fixes or minor enhancements addressing issues discovered shortly after the release of 1.6.7. For developers using Svelte, this means upgrading to 1.6.8 provides the advantage of potentially increased stability and refined performance. Although the core features and API remain unchanged, staying on the latest patch version is always recommended to benefit from improvements without introducing breaking changes. The consistent dependency lists ensure a smooth upgrade process, minimizing potential compatibility issues, and it maintains the commitment of the framework to improve its internals.
All the vulnerabilities related to the version 1.6.8 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