Prototype Pollution

{
  "id": "7ed95462fcaf6e6a8b9ee1b89c9bfc30b8adb108ff4bdd2c1d1bd766e562eef7",
  "url": "https://osv.dev/vulnerability/CVE-2022-21169",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Prototype Pollution",
    "summary": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.",
    "evidence": "osv:CVE-2022-21169",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-21169",
      "aliases": [
        "CVE-2022-21169",
        "GHSA-grjp-4jmr-mjcw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ahmedadelfahim/express-xss-sanitizer",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a90ee0b5ac15fa1b300663d49d5b8b0d6f242d23"
                },
                {
                  "fixed": "3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:express_xss_sanitizer_project:express_xss_sanitizer:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.1.2",
            "v1.1.1",
            "v1.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-21169.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.339807192Z",
      "provider": "osv",
      "references": [
        "https://runkit.com/embed/w306l6zfm7tu",
        "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21169.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-21169",
        "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4",
        "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"
      ],
      "provider_metadata": {
        "cna_assigner": "snyk",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21169.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-21169",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499401,
  "published_at": "2022-09-26T05:05:11.2+00:00"
}