GHSA-HVQ2-WF92-J4F3

Vulnerability from github – Published: 2025-09-26 14:38 – Updated: 2025-09-26 14:38
VLAI
Summary
express-xss-sanitizer has an unbounded recursion depth
Details

Security Advisory: express-xss-sanitizer

Overview

A vulnerability was discovered in express-xss-sanitizer that allowed unbounded recursion depth during sanitization of nested objects.

Affected Versions

  • All versions prior to 2.0.1

Patched Versions

  • 2.0.1 and later

Description

The sanitize function in lib/sanitize.js performed recursive sanitization without depth limiting, making it vulnerable to stack overflow attacks via specially crafted deeply nested JSON objects.

Impact

An attacker could cause denial-of-service by sending a request with deeply nested structures, potentially crashing the Node.js process.

Solution

Upgrade to version 2.0.1 or later:

npm install express-xss-sanitizer@latest
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "express-xss-sanitizer"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-59364"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-26T14:38:13Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "# Security Advisory: express-xss-sanitizer\n\n## Overview\nA vulnerability was discovered in express-xss-sanitizer that allowed unbounded recursion depth during sanitization of nested objects.\n\n## Affected Versions\n- All versions prior to 2.0.1\n\n## Patched Versions\n- 2.0.1 and later\n\n## Description\nThe sanitize function in lib/sanitize.js performed recursive sanitization without depth limiting, making it vulnerable to stack overflow attacks via specially crafted deeply nested JSON objects.\n\n## Impact\nAn attacker could cause denial-of-service by sending a request with deeply nested structures, potentially crashing the Node.js process.\n\n## Solution\nUpgrade to version 2.0.1 or later:\n\n```bash\nnpm install express-xss-sanitizer@latest\n```",
  "id": "GHSA-hvq2-wf92-j4f3",
  "modified": "2025-09-26T14:38:14Z",
  "published": "2025-09-26T14:38:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-hvq2-wf92-j4f3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59364"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/pull/23"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/62d6542a2a57298da7a2e02de623454007e4f6d6"
    },
    {
      "type": "WEB",
      "url": "https://dbugs.ptsecurity.com/vulnerability/PT-2025-37434"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/Spendroslav/177804eaef5acfb222a550de212a1b94"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/express-xss-sanitizer"
    },
    {
      "type": "WEB",
      "url": "https://www.tenable.com/cve/CVE-2025-59364"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "express-xss-sanitizer has an unbounded recursion depth"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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