GSD-2020-26956

Vulnerability from gsd - Updated: 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
CVE-2020-26956
To clipboard 

{
  "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": {
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      "remediation": "unknown",
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    },
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            "accessVector": "NETWORK",
            "authentication": "NONE",
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            "baseScore": 4.3,
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            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
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            "baseScore": 6.1,
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            "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"
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      },
      "lastModifiedDate": "2020-12-10T17:02Z",
      "publishedDate": "2020-12-09T01:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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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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