{"id":"CVE-2024-53262","aliases":["EUVD-2024-3369","GHSA-mh2x-fcqh-fmqv"],"status":"published","title":"Unescaped error message included on error page in SvelteKit","description":"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.","severity":{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00513,"percentile":0.43975,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2024-11-25T15:32:45Z","modified":"2026-10-28T02:30:43Z","fixes":[{"ecosystem":"npm","package":"@sveltejs/kit","fixed_in":["2.8.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@sveltejs/kit","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.3"}]}]},{"source":"osv","ecosystem":"npm","package":"@sveltejs/kit","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.8.3"}]}]}],"products":[{"vendor":"svelte","product":"sveltekit"},{"vendor":"sveltejs","product":"kit"}],"references":[{"url":"https://github.com/sveltejs/kit/security/advisories/GHSA-mh2x-fcqh-fmqv","tags":["x_refsource_CONFIRM","Third Party Advisory","advisory","web"]},{"url":"https://github.com/sveltejs/kit/commit/134e36343ef57ed7e6e2b3bb9e7f05ad37865794","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://kit.svelte.dev/docs/errors","tags":["x_refsource_MISC","Issue Tracking","web"]},{"url":"https://github.com/sveltejs/kit/pull/13050","tags":["web"]},{"url":"https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.8.3","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53262","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mh2x-fcqh-fmqv"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53262.json","tags":["advisory"]},{"url":"https://github.com/sveltejs/kit","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2024-53262","title":"Unescaped error message included on error page in SvelteKit","description":"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.","status":"published","published":"2024-11-25T19:07:20.317Z","modified":"2024-11-25T20:24:05.75Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:34:17.523201Z"}],"euvd":[{"id":"EUVD-2024-3369","description":"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.","status":"published","published":"2024-11-25T19:07:20Z","modified":"2024-11-25T20:24:05Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low"}],"updated_at":"2026-11-03T00:04:48.414867Z"}],"ghsa":[{"id":"GHSA-mh2x-fcqh-fmqv","title":"@sveltejs/kit has unescaped error message included on error page","description":"### Summary\n\nThe static error.html template for errors contains placeholders that are replaced without escaping the content first.\n\n### Details\n\nFrom https://kit.svelte.dev/docs/errors:\n\n\u003e error.html is the page that is rendered when everything else fails. It can contain the following placeholders:\n%sveltekit.status% — the HTTP status\n%sveltekit.error.message% — the error message\n\nThis leads to possible injection if an app explicitly creates an error with a message that contains user controlled content that ends up being something like this inside a server handle function: \n```js\nerror(500, '\u003cscript\u003ealert(\"boom\")\u003c/script\u003e');\n```\nUncaught errors cannot be exploited like this, as they always render the message \"Internal error\".\n\nEscaping the message string in the function that creates the html output can be done to improve safety for applications that are using custom errors on the server.\n\n### PoC\n\nNone provided\n\n### Impact\n\nOnly applications where user provided input is used in the `Error` message will be vulnerable, so the vast majority of applications will not be vulnerable","status":"published","published":"2024-11-25T15:32:45Z","modified":"2026-10-18T14:59:48Z","cvss":[{"version":"4.0","score":1.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","level":"low"},{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:41:32.483482Z"}],"nvd":[{"id":"CVE-2024-53262","description":"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.","status":"published","published":"2024-11-25T20:15:10.423Z","modified":"2026-06-17T08:08:42.78Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:10:38.347238Z"}],"osv":[{"id":"CVE-2024-53262","title":"Unescaped error message included on error page in SvelteKit","description":"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.","status":"published","published":"2024-11-25T19:07:20.317Z","modified":"2026-10-28T02:30:43.18614825Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:44.451316Z"},{"id":"GHSA-mh2x-fcqh-fmqv","title":"@sveltejs/kit has unescaped error message included on error page","description":"### Summary\n\nThe static error.html template for errors contains placeholders that are replaced without escaping the content first.\n\n### Details\n\nFrom https://kit.svelte.dev/docs/errors:\n\n\u003e error.html is the page that is rendered when everything else fails. It can contain the following placeholders:\n%sveltekit.status% — the HTTP status\n%sveltekit.error.message% — the error message\n\nThis leads to possible injection if an app explicitly creates an error with a message that contains user controlled content that ends up being something like this inside a server handle function: \n```js\nerror(500, '\u003cscript\u003ealert(\"boom\")\u003c/script\u003e');\n```\nUncaught errors cannot be exploited like this, as they always render the message \"Internal error\".\n\nEscaping the message string in the function that creates the html output can be done to improve safety for applications that are using custom errors on the server.\n\n### PoC\n\nNone provided\n\n### Impact\n\nOnly applications where user provided input is used in the `Error` message will be vulnerable, so the vast majority of applications will not be vulnerable","status":"published","published":"2024-11-25T15:32:45Z","modified":"2024-11-25T21:46:57Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":1.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:51.811331Z"}]}}