GSD-2021-26540

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the "allowedIframeHostnames" option when the "allowIframeRelativeUrls" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with "/\\example.com".
Aliases
Aliases
CVE-2021-26540
To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-26540",
    "description": "Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the \"allowedIframeHostnames\" option when the \"allowIframeRelativeUrls\" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with \"/\\\\example.com\".",
    "id": "GSD-2021-26540",
    "references": [
      "https://access.redhat.com/errata/RHSA-2021:3759",
      "https://access.redhat.com/errata/RHSA-2021:2438"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-26540"
      ],
      "details": "Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the \"allowedIframeHostnames\" option when the \"allowIframeRelativeUrls\" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with \"/\\\\example.com\".",
      "id": "GSD-2021-26540",
      "modified": "2023-12-13T01:23:33.347763Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2021-26540",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
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              "vendor_name": "n/a"
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          }
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                "value": "n/a"
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            "name": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26",
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            "url": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26"
          },
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            "refsource": "MISC",
            "url": "https://github.com/apostrophecms/sanitize-html/pull/460"
          },
          {
            "name": "https://advisory.checkmarx.net/advisory/CX-2021-4309",
            "refsource": "MISC",
            "url": "https://advisory.checkmarx.net/advisory/CX-2021-4309"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c2.3.2",
          "affected_versions": "All versions before 2.3.2",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2021-04-01",
          "description": "sanitize-html does not properly validate the hostnames set by the `allowedIframeHostnames` option when the `allowIframeRelativeUrls` is set to true, which allows attackers to bypass the hostname allow list for an iframe element.",
          "fixed_versions": [
            "2.3.2"
          ],
          "identifier": "CVE-2021-26540",
          "identifiers": [
            "CVE-2021-26540"
          ],
          "not_impacted": "All versions starting from 2.3.2",
          "package_slug": "npm/sanitize-html",
          "pubdate": "2021-02-08",
          "solution": "Upgrade to version 2.3.2 or above.",
          "title": "Origin Validation Error",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-26540"
          ],
          "uuid": "1e00e846-7301-49bb-8b74-007e58885922"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:apostrophecms:sanitize-html:*:*:*:*:*:node.js:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.3.2",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
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        "description": {
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              "value": "Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the \"allowedIframeHostnames\" option when the \"allowIframeRelativeUrls\" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with \"/\\\\example.com\"."
            }
          ]
        },
        "problemtype": {
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            {
              "name": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26",
              "refsource": "MISC",
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                "Release Notes",
                "Third Party Advisory"
              ],
              "url": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26"
            },
            {
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              "tags": [
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                "Third Party Advisory"
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              "url": "https://advisory.checkmarx.net/advisory/CX-2021-4309"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2021-04-01T15:02Z",
      "publishedDate": "2021-02-08T17:15Z"
    }
  }
}


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