{"id":"GHSA-rjjv-87mx-6x3h","summary":"@sveltejs/kit vulnerable to XSS on dev mode 404 page","details":"### Summary\n\n\"Unsanitized input from *the request URL* flows into `end`, where it is used to render an HTML page returned to the user. This may result in a Cross-Site Scripting attack (XSS).\"\n\n### Details\n\nSource of potentially tainted data is in `packages/kit/src/exports/vite/dev/index.js`, line 437. This potentially tainted data is passed through a number of steps (which I could detail if you'd like) all the way down to line 91 in `packages/kit/src/exports/vite/utils.js`, which performs an operation that Snyk believes an attacker shouldn't be allowed to manipulate.\n\nAnother source of potentially tainted data (according to Snyk) comes from `\u200epackages/kit/src/exports/vite/utils.js`, line 30, col 30 (i.e., the `url` property of `req`). This potentially tainted data is passed through a number of steps (which I could detail if you'd like) all the way down line 91 in `packages/kit/src/exports/vite/utils.js`, which performs an operation that Snyk believes an attacker shouldn't be allowed to manipulate.\n\n### PoC\n\nNot provided\n\n### Impact\n\nLittle to none. The Vite development is not exposed to the network by default. And even if someone were able to trick a developer into executing an XSS against themselves, a development database should not have any sensitive data.","aliases":["CVE-2024-53261"],"modified":"2025-01-22T20:54:21Z","published":"2024-11-25T15:33:19Z","database_specific":{"github_reviewed_at":"2024-11-25T15:33:19Z","nvd_published_at":"2024-11-25T20:15:10Z","cwe_ids":["CWE-79"],"severity":"LOW","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/sveltejs/kit/security/advisories/GHSA-rjjv-87mx-6x3h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53261"},{"type":"WEB","url":"https://github.com/sveltejs/kit/pull/13039"},{"type":"WEB","url":"https://github.com/sveltejs/kit/commit/d338d4635a7fd947ba5112df6ee632c4a0979438"},{"type":"PACKAGE","url":"https://github.com/sveltejs/kit"},{"type":"WEB","url":"https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.8.3"}],"affected":[{"package":{"name":"@sveltejs/kit","ecosystem":"npm","purl":"pkg:npm/%40sveltejs/kit"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.8.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/11/GHSA-rjjv-87mx-6x3h/GHSA-rjjv-87mx-6x3h.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N"}]}