GHSA-CHQJ-J4FH-RW7M

Vulnerability from github – Published: 2020-08-28 21:25 – Updated: 2023-09-13 18:51
VLAI?
Summary
Cross-Site Scripting in dompurify
Details

Versions of dompurify prior to 2.0.3 are vulnerable to Cross-Site Scripting (XSS). The package has an XSS filter bypass due to Mutation XSS in both Chrome and Safari through a combination of <svg>/<math> elements and </p>/</br>. An example payload is: <svg></p><style><a id="</style><img src=1 onerror=alert(1)>">. This allows attackers to bypass the XSS protection and execute arbitrary JavaScript in a victim's browser.

Recommendation

Upgrade to version 2.0.3 or later. You may also disallow <svg> and <math> through dompurify configurations: DOMPurify.sanitize(input, { FORBID_TAGS: ['svg', 'math'] });

Severity ?
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "dompurify"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2019-16728"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-28T21:24:05Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "Versions of `dompurify` prior to 2.0.3 are vulnerable to Cross-Site Scripting (XSS). The package has an XSS filter bypass due to Mutation XSS in both Chrome and Safari through a combination of `\u003csvg\u003e`/`\u003cmath\u003e` elements and `\u003c/p\u003e`/`\u003c/br\u003e`. An example payload is: `\u003csvg\u003e\u003c/p\u003e\u003cstyle\u003e\u003ca id=\"\u003c/style\u003e\u003cimg src=1 onerror=alert(1)\u003e\"\u003e`. This allows attackers to bypass the XSS protection and execute arbitrary JavaScript in a victim\u0027s browser.\n\n\n## Recommendation\n\nUpgrade to version 2.0.3 or later. You may also disallow `\u003csvg\u003e` and `\u003cmath\u003e` through `dompurify` configurations:\n```DOMPurify.sanitize(input, {\n     FORBID_TAGS: [\u0027svg\u0027, \u0027math\u0027]\n });```",
  "id": "GHSA-chqj-j4fh-rw7m",
  "modified": "2023-09-13T18:51:44Z",
  "published": "2020-08-28T21:25:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-16728"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html"
    },
    {
      "type": "WEB",
      "url": "https://research.securitum.com/dompurify-bypass-using-mxss"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/1205"
    }
  ],
  "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"
    }
  ],
  "summary": "Cross-Site Scripting in dompurify"
}


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