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GHSA-X77J-W7WF-FJMW

Vulnerability from github – Published: 2023-04-20 21:19 – Updated: 2024-11-26 18:54
VLAI
Summary
Nunjucks autoescape bypass leads to cross site scripting
Details

Impact

In Nunjucks versions prior to version 3.2.4, it was possible to bypass the restrictions which are provided by the autoescape functionality. If there are two user-controlled parameters on the same line used in the views, it was possible to inject cross site scripting payloads using the backslash \ character.

Example

If the user-controlled parameters were used in the views similar to the following:

<script>
let testObject = { lang: '{{ lang }}', place: '{{ place }}' };
</script>

It is possible to inject XSS payload using the below parameters:

https://<application-url>/?lang=jp\&place=};alert(document.domain)//

Patches

The issue was patched in version 3.2.4.

References

  • https://bugzilla.mozilla.org/show_bug.cgi?id=1825980
Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "nunjucks"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-2142"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-04-20T21:19:24Z",
    "nvd_published_at": "2024-11-26T12:15:18Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nIn Nunjucks versions prior to version 3.2.4, it was possible to bypass the restrictions which are provided by the autoescape functionality. If there are two user-controlled parameters on the same line used in the views, it was possible to inject cross site scripting payloads using the backslash `\\` character.\n\n#### Example\nIf the user-controlled parameters were used in the views similar to the following:\n```\n\u003cscript\u003e\nlet testObject = { lang: \u0027{{ lang }}\u0027, place: \u0027{{ place }}\u0027 };\n\u003c/script\u003e\n```\n\nIt is possible to inject XSS payload using the below parameters:\n```\nhttps://\u003capplication-url\u003e/?lang=jp\\\u0026place=};alert(document.domain)//\n```\n\n### Patches\nThe issue was patched in version 3.2.4.\n\n### References\n\n- https://bugzilla.mozilla.org/show_bug.cgi?id=1825980\n",
  "id": "GHSA-x77j-w7wf-fjmw",
  "modified": "2024-11-26T18:54:25Z",
  "published": "2023-04-20T21:19:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mozilla/nunjucks/security/advisories/GHSA-x77j-w7wf-fjmw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2142"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mozilla/nunjucks/pull/1437"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mozilla/nunjucks/commit/ec16d210e7e13f862eccdb0bc9af9f60ff6749d6"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1825980"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mozilla/nunjucks"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mozilla/nunjucks/releases/tag/v3.2.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Nunjucks autoescape bypass leads to cross site scripting"
}



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