ghsa-jc85-fpwf-qm7x
Vulnerability from github
Published
2025-11-05 03:30
Modified
2025-11-05 18:46
Severity ?
8.6 (High) - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
expr-eval does not restrict functions passed to the evaluate function
Details

The expr-eval library is a JavaScript expression parser and evaluator designed to safely evaluate mathematical expressions with user-defined variables. However, due to insufficient input validation, an attacker can pass a crafted variables object into the evaluate() function and trigger arbitrary code execution.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "expr-eval"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2.0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "expr-eval-fork"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2.0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-12735"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-05T18:46:50Z",
    "nvd_published_at": "2025-11-05T01:15:33Z",
    "severity": "HIGH"
  },
  "details": "The expr-eval library is a JavaScript expression parser and evaluator designed to safely evaluate mathematical expressions with user-defined variables. However, due to insufficient input validation, an attacker can pass a crafted variables object into the evaluate() function and trigger arbitrary code execution.",
  "id": "GHSA-jc85-fpwf-qm7x",
  "modified": "2025-11-05T18:46:50Z",
  "published": "2025-11-05T03:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-12735"
    },
    {
      "type": "WEB",
      "url": "https://github.com/silentmatt/expr-eval/pull/288"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jorenbroekema/expr-eval"
    },
    {
      "type": "WEB",
      "url": "https://github.com/silentmatt/expr-eval"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/expr-eval"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/expr-eval-fork"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "expr-eval does not restrict functions passed to the evaluate function"
}


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