Vulnerability-Lookup

CVE-2025-32388 (GCVE-0-2025-32388)

Vulnerability from cvelistv5 – Published: 2025-04-15 22:32 – Updated: 2025-04-16 13:33

Title

SvelteKit allows XSS via tracked search_params

Summary

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.20.6 , unsanitized search param names cause XSS vulnerability. You are affected if you iterate over all entries of event.url.searchParams inside a server load function. Attackers can exploit it by crafting a malicious URL and getting a user to click a link with said URL. This vulnerability is fixed in 2.20.6.

Severity ?

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/sveltejs/kit/security/advisori…	x_refsource_CONFIRM
	https://github.com/sveltejs/kit/commit/d3300c6a67…	x_refsource_MISC
	https://github.com/sveltejs/kit/releases/tag/%40s…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	sveltejs	kit	Affected: >= 2.0.0, < 2.20.6

Show details on NVD website

JSON

To clipboard

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GHSA-6Q87-84JW-CJHP

Vulnerability from github – Published: 2025-04-14 19:10 – Updated: 2025-04-16 00:40

Summary

@sveltejs/kit vulnerable to Cross-site Scripting via tracked search_params

Details

Summary

Unsanitized search param names cause XSS vulnerability. You are affected if you iterate over all entries of event.url.searchParams inside a server load function. Attackers can exploit it by crafting a malicious URL and getting a user to click a link with said URL.

Details

SvelteKit tracks which parameters in event.url.searchParams are read inside server load functions. If the application iterates over the these parameters, the uses.search_params array included in the boot script (embedded in the server-rendered HTML) will have any search param name included in unsanitized form.

packages/kit/src/runtime/server/utils.js:150 has the stringify_uses(node) function which prints these out.

Reproduction

In a +page.server.js or +layout.server.js:

/** @type {import('@sveltejs/kit').Load} */
export function load(event) {
  const values = {};

  for (const key of event.url.searchParams.keys()) {
    values[key] = event.url.searchParams.get(key);
  }
}

If a user visits the page in question via a link containing ?</script/><script>window.pwned%3D1</script/>, the </script> will be included verbatim in the payload, causing the embedded script to be executed.

It is not necessary to return the parameter value from load or render it in the page, only to read it (which causes it to be tracked as a dependency) while load is running.

Impact

Any application that iterates over all values in event.url.searchParams in a load function in +page.server.js or +layout.server.js (directly or indirectly) is vulnerable to XSS.

Severity ?

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@sveltejs/kit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.20.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-32388"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-14T19:10:42Z",
    "nvd_published_at": "2025-04-15T23:15:42Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nUnsanitized search param names cause XSS vulnerability. You are affected if you iterate over all entries of `event.url.searchParams` inside a server `load` function. Attackers can exploit it by crafting a malicious URL and getting a user to click a link with said URL.\n\n### Details\n\nSvelteKit tracks which parameters in `event.url.searchParams` are read inside server `load` functions. If the application iterates over the these parameters, the `uses.search_params` array included in the boot script (embedded in the server-rendered HTML) will have any search param name included in unsanitized form.\n\n`packages/kit/src/runtime/server/utils.js:150` has the `stringify_uses(node)` function which prints these out.\n\n### Reproduction\n\nIn a `+page.server.js` or `+layout.server.js`:\n\n```js\n/** @type {import(\u0027@sveltejs/kit\u0027).Load} */\nexport function load(event) {\n  const values = {};\n\n  for (const key of event.url.searchParams.keys()) {\n    values[key] = event.url.searchParams.get(key);\n  }\n}\n```\n\nIf a user visits the page in question via a link containing `?\u003c/script/\u003e\u003cscript\u003ewindow.pwned%3D1\u003c/script/\u003e`, the `\u003c/script\u003e` will be included verbatim in the payload, causing the embedded script to be executed.\n\nIt is not necessary to return the parameter value from `load` or render it in the page, only to read it (which causes it to be tracked as a dependency) while `load` is running.\n\n### Impact\n\nAny application that iterates over all values in `event.url.searchParams` in a `load` function in `+page.server.js` or `+layout.server.js` (directly or indirectly) is vulnerable to XSS.",
  "id": "GHSA-6q87-84jw-cjhp",
  "modified": "2025-04-16T00:40:49Z",
  "published": "2025-04-14T19:10:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-6q87-84jw-cjhp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32388"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sveltejs/kit/commit/d3300c6a67908590266c363dba7b0835d9a194cf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sveltejs/kit"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.20.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@sveltejs/kit vulnerable to Cross-site Scripting via tracked search_params"
}

FKIE_CVE-2025-32388

Vulnerability from fkie_nvd - Published: 2025-04-15 23:15 - Updated: 2025-04-16 13:25

Severity ?

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/sveltejs/kit/commit/d3300c6a67908590266c363dba7b0835d9a194cf
	security-advisories@github.com	https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.20.6
	security-advisories@github.com	https://github.com/sveltejs/kit/security/advisories/GHSA-6q87-84jw-cjhp

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.20.6 , unsanitized search param names cause XSS vulnerability. You are affected if you iterate over all entries of event.url.searchParams inside a server load function. Attackers can exploit it by crafting a malicious URL and getting a user to click a link with said URL. This vulnerability is fixed in 2.20.6."
    },
    {
      "lang": "es",
      "value": "SvelteKit es un framework para desarrollar r\u00e1pidamente aplicaciones web robustas y de alto rendimiento con Svelte. Antes de la versi\u00f3n 2.20.6, los nombres de par\u00e1metros de b\u00fasqueda sin sanear causaban una vulnerabilidad XSS. Se ve afectado si se itera sobre todas las entradas de event.url.searchParams dentro de una funci\u00f3n de carga del servidor. Los atacantes pueden explotar esta vulnerabilidad manipulando una URL maliciosa y haciendo que el usuario haga clic en un enlace con dicha URL. Esta vulnerabilidad se corrigi\u00f3 en la versi\u00f3n 2.20.6."
    }
  ],
  "id": "CVE-2025-32388",
  "lastModified": "2025-04-16T13:25:37.340",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-04-15T23:15:42.843",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/sveltejs/kit/commit/d3300c6a67908590266c363dba7b0835d9a194cf"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.20.6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-6q87-84jw-cjhp"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2025-32388 (GCVE-0-2025-32388)

GHSA-6Q87-84JW-CJHP

Summary

Details

Reproduction

Impact

FKIE_CVE-2025-32388

Tags

Sightings

Nomenclature