Vulnerability from bitnami_vulndb
Published
2024-03-06 11:05
Modified
2025-05-20 10:02
Summary
Incorrect URL validation in FILTER_VALIDATE_URL
Details

In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using URL validation functionality via filter_var() function with FILTER_VALIDATE_URL parameter, an URL with invalid password field can be accepted as valid. This can lead to the code incorrectly parsing the URL and potentially leading to other security implications - like contacting a wrong server or making a wrong access decision.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "php",
        "purl": "pkg:bitnami/php"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.3.0"
            },
            {
              "fixed": "7.3.29"
            },
            {
              "introduced": "7.4.0"
            },
            {
              "fixed": "7.4.21"
            },
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.8"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21705"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using URL validation functionality via filter_var() function with FILTER_VALIDATE_URL parameter, an URL with invalid password field can be accepted as valid. This can lead to the code incorrectly parsing the URL and potentially leading to other security implications - like contacting a wrong server or making a wrong access decision.",
  "id": "BIT-php-2021-21705",
  "modified": "2025-05-20T10:02:07.006Z",
  "published": "2024-03-06T11:05:02.602Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bugs.php.net/bug.php?id=81122"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202209-20"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20211029-0006/"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21705"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Incorrect URL validation in FILTER_VALIDATE_URL"
}


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Detection rules are retrieved from Rulezet.