XSS in Svelte Sveltekit
CVE-2024-53262
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. The static error.html template for errors contains placeholders that are replaced without escaping the content first. error.html is the page that is rendered when everything else fails. It can contain the following placeholders: %sveltekit.status% — the HTTP status, and %sveltekit.error.message% — the error message. This leads to possible injection if an app explicitly creates an error with a message that contains user controlled content. Only applications where user provided input is used in the `Error` message will be vulnerable, so the vast majority of applications will not be vulnerable This issue has been addressed in version 2.8.3 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Svelte Sveltekit
- Sveltejs Kit — versions < 2.8.3
Weakness classification (CWE)
References
- github.com/sveltejs/kit/security/advisories/GHSA-mh2x-fcqh-fmqv (Third Party Advisory)
- github.com/sveltejs/kit/commit/134e36343ef57ed7e6e2b3bb9e7f05ad37865794 (Patch)
- kit.svelte.dev/docs/errors (Issue Tracking)
Frequently asked questions
- What is CVE-2024-53262?
- CVE-2024-53262 is a medium-severity vulnerability in Svelte Sveltekit, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2024-11-25.
- How severe is CVE-2024-53262?
- Medium severity. CVSS v3 base score is 5.4 out of 10.