gsd-2020-26956
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Aliases
Aliases



{
  "GSD": {
    "alias": "CVE-2020-26956",
    "description": "In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox \u003c 83, Firefox ESR \u003c 78.5, and Thunderbird \u003c 78.5.",
    "id": "GSD-2020-26956",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-26956.html",
      "https://www.debian.org/security/2020/dsa-4796",
      "https://www.debian.org/security/2020/dsa-4793",
      "https://access.redhat.com/errata/RHSA-2020:5314",
      "https://access.redhat.com/errata/RHSA-2020:5257",
      "https://access.redhat.com/errata/RHSA-2020:5240",
      "https://access.redhat.com/errata/RHSA-2020:5239",
      "https://access.redhat.com/errata/RHSA-2020:5238",
      "https://access.redhat.com/errata/RHSA-2020:5237",
      "https://access.redhat.com/errata/RHSA-2020:5236",
      "https://access.redhat.com/errata/RHSA-2020:5235",
      "https://access.redhat.com/errata/RHSA-2020:5234",
      "https://access.redhat.com/errata/RHSA-2020:5233",
      "https://access.redhat.com/errata/RHSA-2020:5232",
      "https://access.redhat.com/errata/RHSA-2020:5231",
      "https://ubuntu.com/security/CVE-2020-26956",
      "https://advisories.mageia.org/CVE-2020-26956.html",
      "https://security.archlinux.org/CVE-2020-26956",
      "https://linux.oracle.com/cve/CVE-2020-26956.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-26956"
      ],
      "details": "In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox \u003c 83, Firefox ESR \u003c 78.5, and Thunderbird \u003c 78.5.",
      "id": "GSD-2020-26956",
      "modified": "2023-12-13T01:22:08.601397Z",
      "schema_version": "1.4.0"
    }
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          }
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      "problemtype": {
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    "nvd.nist.gov": {
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      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2020-12-10T17:02Z",
      "publishedDate": "2020-12-09T01:15Z"
    }
  }
}


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