Svelte version 2.14.2 represents a minor update over its predecessor, 2.14.1, focusing on delivering stability and incremental improvements to this "magical disappearing UI framework." Both versions share the same core philosophy: to compile Svelte components into highly efficient JavaScript at build time, resulting in fast and lightweight web applications. Examining the package.json data, their devDependencies show no visible changes, implying that the core tooling and build process remain consistent between the two releases. The key differences lie within the compiled code itself reflected in dist attribute.
Version 2.14.2 has a slightly larger unpacked size (974345 bytes) compared to 2.14.1 (956024 bytes), and a larger file count within the published package (15 vs 12), suggesting that the newer version incorporates bug fixes, performance enhancements, or minor feature additions that necessitate a larger footprint. The updated releaseDate also confirms that 2.14.2 was published a few days after 2.14.1.
For developers, this suggests that upgrading from 2.14.1 to 2.14.2 should be a straightforward process with minimal risk of introducing breaking changes. The update likely addresses reported issues or edge cases found in the previous version. It's typically advisable to keep your Svelte projects up-to-date with the latest minor releases to benefit from these improvements and ensure compatibility with the broader Svelte ecosystem. Reviewing the detailed changelog or release notes (available on the Svelte GitHub repository) would reveal the specific modifications included in 2.14.2.
All the vulnerabilities related to the version 2.14.2 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