chore(deps): update dependency svelte to v4.2.19 [security] - autoclosed

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
svelte (source)	4.2.18 -> 4.2.19

GitHub Vulnerability Alerts

CVE-2024-45047

Summary

A potential XSS vulnerability exists in Svelte for versions prior to 4.2.19.

Details

Svelte improperly escapes HTML on server-side rendering. It converts strings according to the following rules:

• If the string is an attribute value:
  • " -> "
  • & -> &
  • Other characters -> No conversion
• Otherwise:
  • < -> <
  • & -> &
  • Other characters -> No conversion

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.

PoC

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.

Impact

XSS, when using an attribute within a noscript tag

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Release Notes

sveltejs/svelte (svelte)

v4.2.19

Compare Source

Patch Changes

• fix: ensure typings for <svelte:options> are picked up (#​12902)

• fix: escape < in attribute strings (#​12989)

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Configuration

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[cypress]

Mermaid Live Editor    Run #1643

Run Properties:   Failed #1643  •  8d4c037a77 ℹ️: Merge dce90e2ff16ef40ae4a85eda1ae7915787ab4d5a into ee156c7e690ebdadd65af3aba2cd...

Project	Mermaid Live Editor
Branch Review	renovate/npm-svelte-vulnerability
Run status	Failed #1643
Run duration	02m 14s
Commit	8d4c037a77 ℹ️: Merge dce90e2ff16ef40ae4a85eda1ae7915787ab4d5a into ee156c7e690ebdadd65af3aba2cd...
Committer	renovate[bot]
View all properties for this run ↗︎

---

Test results
Failures	1
Flaky	0
Pending	6
Skipped	0
Passing	28
View all changes introduced in this branch ↗︎

---

Tests for review

  cypress/e2e/history.spec.ts • 1 failed test

View Output Video

Test		Artifacts
Save History > should be able to restore and delete		Screenshots Video