Is CVE-2024-53261 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2024-53261 being exploited in the wild.

How severe is CVE-2024-53261?

Low severity, with a CVSS score of 3.1, published 25 November 2024.

Which products and versions are affected?

@sveltejs/kit (npm) SEMVER:introduced=0,fixed=2.8.3.

Is there a fix for CVE-2024-53261?

Yes. @sveltejs/kit (npm): upgrade to 2.8.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2024-53261 attacked?

It is attacked from the adjacent network.

Am I affected by CVE-2024-53261?

Check whether you run @sveltejs/kit (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2024-53261: SvelteJS Kit cross-site scripting in dev mode 404 page

CVE-2024-53261 · Severity: low · CVSS 3.1 · Published 2024-11-25

SvelteJS Kit is a framework for building web applications. During development, the 404 error page fails to sanitize malicious input from the URL, allowing an attacker to inject JavaScript code that executes in a developer's browser. While the development server is not typically exposed to the network, an attacker could trick a developer into clicking a malicious link, potentially compromising their local development environment.

Technologies: @sveltejs/kit (npm). Vendors: npm.

Quick answers

Is CVE-2024-53261 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2024-53261 being exploited in the wild.
How severe is CVE-2024-53261?: Low severity, with a CVSS score of 3.1, published 25 November 2024.
Which products and versions are affected?: @sveltejs/kit (npm) SEMVER:introduced=0,fixed=2.8.3.
Is there a fix for CVE-2024-53261?: Yes. @sveltejs/kit (npm): upgrade to 2.8.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2024-53261 attacked?: It is attacked from the adjacent network.
Am I affected by CVE-2024-53261?: Check whether you run @sveltejs/kit (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

@sveltejs/kit (npm): upgrade to 2.8.3 or later
```
npm install @sveltejs/kit@2.8.3
```

Technical details

This is a cross-site scripting (XSS) vulnerability in SvelteJS Kit's development mode. Unsanitized user input from the request URL flows into the 404 error page rendering logic in packages/kit/src/exports/vite/dev/index.js (line 437), propagates through packages/kit/src/exports/vite/utils.js (line 91), and is output in the HTML page without proper sanitization. The vulnerability requires user interaction (the developer must click a malicious link) and is restricted to the adjacent network attack vector. While the impact is low (development servers are not network-exposed by default, and dev databases lack sensitive data), an attacker could craft a malicious URL to execute arbitrary JavaScript in a developer's browser during development. The vulnerability is fixed in version 2.8.3 and later.

Affected products

SvelteJS Kit < 2.8.3

Identifiers

CVE-2024-53261
GHSA-rjjv-87mx-6x3h

Timeline

2024-11-25: disclosed
2024-11-25: patched: Version 2.8.3 released

References

https://github.com/sveltejs/kit/security/advisories/GHSA-rjjv-87mx-6x3h

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