CVE-2025-30222: Shescape Shescape Has Potential Environment Variable Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-66pp-5p9w-q87j",
  "modified" : "2025-03-26T14:54:22Z",
  "published" : "2025-03-26T14:54:22Z",
  "aliases" : [ "CVE-2025-30222" ],
  "summary" : "Shescape has potential environment variable exposure on Windows with CMD",
  "details" : "### Impact\n\nThis impact users of Shescape on Windows that explicitly configure `shell: 'cmd.exe'` or `shell: true` using any of `quote`/`quoteAll`/`escape`/`escapeAll`.\n\nAn attacker may be able to get read-only access to environment variables. Example:\n\n```javascript\nimport * as cp from \"node:child_process\";\nimport { Shescape } from \"shescape\";\n\n// 1. Prerequisites\nconst shescape = new Shescape({\n    shell: \"cmd.exe\",\n    // Or\n    shell: true, // Only if the default shell is CMD\n});\n\n// 2. Payload\nconst payload = '\"%PATH%';\n\n// 3. Usage\nlet escapedPayload;\n\nescapedPayload = shescape.quote(payload);\n// Or\nescapedPayload = shescape.quoteAll([payload]);\n// Or\nescapedPayload = shescape.escape(payload);\n// Or\nescapedPayload = shescape.escapeAll([payload]);\n\n// And (example)\nconst result = cp.execSync(`echo Hello ${escapedPayload}`, options);\n\n// 4. Impact\nconsole.log(result.toString());\n// Outputs \"Hello\" followed by the contents of the PATH environment variable\n```\n\nFor Shescape prior to v2.0.0, the `options` object must have `shell: 'cmd.exe'` or `shell: undefined` and `interpolation: true`.\n\n\n### Patches\n\nThis bug has been patched in [v2.1.2](https://github.com/ericcornelissen/shescape/releases/tag/v2.1.2) which you can upgrade to now.\n\nIf you are already using v2 of Shescape, no further changes are required. If you are using v1 of Shescape, follow the [migration guide](https://github.com/ericcornelissen/shescape/blob/155b13b4141750203ce71249f1b0fdc638c7a0d0/docs/migration.md) to upgrade to v2. There is no plan to release a patch compatible with v1 of Shescape.\n\n\n### Workarounds\n\nAlternatively, users can remove all instances of % from user input before using Shescape.\n\n\n### References\n\n- Shescape Pull Request [#1916](https://github.com/ericcornelissen/shescape/pull/1916)\n- Shescape commit [0a81f1e](https://github.com/ericcornelissen/shescape/commit/0a81f1eb077bab8caae283a2490cd7be9af179c6)\n- Shescape release [v2.1.2](https://github.com/ericcornelissen/shescape/releases/tag/v2.1.2)\n\n\n### For more information\n\n- Comment on Pull Request [#1916](https://github.com/ericcornelissen/shescape/pull/1916)\n- Comment on commit [0a81f1e](https://github.com/ericcornelissen/shescape/commit/0a81f1eb077bab8caae283a2490cd7be9af179c6)\n- Open an issue at [https://github.com/ericcornelissen/shescape/issues](https://github.com/ericcornelissen/shescape/issues) (New issue > Question)",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "shescape"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.7.2"
      }, {
        "fixed" : "2.1.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ericcornelissen/shescape/security/advisories/GHSA-66pp-5p9w-q87j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-30222"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ericcornelissen/shescape/pull/1916"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ericcornelissen/shescape/commit/0a81f1eb077bab8caae283a2490cd7be9af179c6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ericcornelissen/shescape"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ericcornelissen/shescape/releases/tag/v2.1.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-26T14:54:22Z",
    "nvd_published_at" : "2025-03-25T23:15:36Z"
  }
}