ghsa-f7ph-p5rv-phw2
Vulnerability from github
Published
2018-11-06 23:13
Modified
2020-08-31 18:12
Summary
Cross-Site Scripting in nunjucks
Details

Affected versions of nunjucks do not properly escape specially structured user input in template vars when in auto-escape mode, resulting in a cross-site scripting vulnerability.

Proof of Concept

By using an array for the keys in a template var, escaping is bypassed. javascript name[]=<script>alert(1)</script>

A full PoC is available in the references section.

Recommendation

Update to version 2.4.3 or later.

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "nunjucks"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2016-10547"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:34:04Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "Affected versions of `nunjucks` do not properly escape specially structured user input in template vars when in auto-escape mode, resulting in a cross-site scripting vulnerability.\n\n## Proof of Concept\n\nBy using an array for the keys in a template var, escaping is bypassed.\n```javascript\nname[]=\u003cscript\u003ealert(1)\u003c/script\u003e\n```\n\nA full PoC is available in the references section.\n\n\n## Recommendation\n\nUpdate to version 2.4.3 or later.",
  "id": "GHSA-f7ph-p5rv-phw2",
  "modified": "2020-08-31T18:12:27Z",
  "published": "2018-11-06T23:13:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-10547"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mozilla/nunjucks/issues/835"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-f7ph-p5rv-phw2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matt-/nunjucks_test"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/147"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Cross-Site Scripting in nunjucks"
}


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