GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
usn-4893-1
Vulnerability from osv_ubuntu
Published
2021-03-25 22:36
Modified
2026-04-22 07:36
Summary
firefox vulnerabilities
Details

Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. (CVE-2021-23981, CVE-2021-23982, CVE-2021-23983, CVE-2021-23987, CVE-2021-23988)

It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spook a website and trick the user into providing credentials. (CVE-2021-23984)

It was discovered that the DevTools remote debugging feature could be enabled without an indication to the user. If a local attacker could modify the browser configuration, a remote attacker could potentially exploit this to obtain sensitive information. (CVE-2021-23985)

It was discovered that extensions could read the response of cross origin requests in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to obtain sensitive information. (CVE-2021-23986)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-23981",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23982",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23983",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23984",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23985",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23986",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23987",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23988",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "firefox",
            "binary_version": "87.0+build3-0ubuntu0.16.04.2"
          },
          {
            "binary_name": "firefox-geckodriver",
            "binary_version": "87.0+build3-0ubuntu0.16.04.2"
          },
          {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "87.0+build3-0ubuntu0.16.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "firefox",
        "purl": "pkg:deb/ubuntu/firefox@87.0+build3-0ubuntu0.16.04.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "87.0+build3-0ubuntu0.16.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "41.0.2+build2-0ubuntu1",
        "42.0+build2-0ubuntu1",
        "44.0+build3-0ubuntu2",
        "44.0.1+build1-0ubuntu1",
        "44.0.2+build1-0ubuntu1",
        "45.0+build2-0ubuntu1",
        "45.0.1+build1-0ubuntu1",
        "45.0.2+build1-0ubuntu1",
        "46.0+build5-0ubuntu0.16.04.2",
        "46.0.1+build1-0ubuntu0.16.04.2",
        "47.0+build3-0ubuntu0.16.04.1",
        "48.0+build2-0ubuntu0.16.04.1",
        "49.0+build4-0ubuntu0.16.04.1",
        "49.0.2+build2-0ubuntu0.16.04.2",
        "50.0+build2-0ubuntu0.16.04.2",
        "50.0.2+build1-0ubuntu0.16.04.1",
        "50.1.0+build2-0ubuntu0.16.04.1",
        "51.0.1+build2-0ubuntu0.16.04.1",
        "51.0.1+build2-0ubuntu0.16.04.2",
        "52.0+build2-0ubuntu0.16.04.1",
        "52.0.1+build2-0ubuntu0.16.04.1",
        "52.0.2+build1-0ubuntu0.16.04.1",
        "53.0+build6-0ubuntu0.16.04.1",
        "53.0.2+build1-0ubuntu0.16.04.2",
        "53.0.3+build1-0ubuntu0.16.04.2",
        "54.0+build3-0ubuntu0.16.04.1",
        "55.0.1+build2-0ubuntu0.16.04.2",
        "55.0.2+build1-0ubuntu0.16.04.1",
        "56.0+build6-0ubuntu0.16.04.1",
        "56.0+build6-0ubuntu0.16.04.2",
        "57.0+build4-0ubuntu0.16.04.5",
        "57.0+build4-0ubuntu0.16.04.6",
        "57.0.1+build2-0ubuntu0.16.04.1",
        "57.0.3+build1-0ubuntu0.16.04.1",
        "57.0.4+build1-0ubuntu0.16.04.1",
        "58.0+build6-0ubuntu0.16.04.1",
        "58.0.1+build1-0ubuntu0.16.04.1",
        "58.0.2+build1-0ubuntu0.16.04.1",
        "59.0+build5-0ubuntu0.16.04.1",
        "59.0.1+build1-0ubuntu0.16.04.1",
        "59.0.2+build1-0ubuntu0.16.04.1",
        "59.0.2+build1-0ubuntu0.16.04.3",
        "60.0+build2-0ubuntu0.16.04.1",
        "60.0.1+build2-0ubuntu0.16.04.1",
        "60.0.2+build1-0ubuntu0.16.04.1",
        "61.0+build3-0ubuntu0.16.04.2",
        "61.0.1+build1-0ubuntu0.16.04.1",
        "62.0+build2-0ubuntu0.16.04.3",
        "62.0+build2-0ubuntu0.16.04.4",
        "62.0+build2-0ubuntu0.16.04.5",
        "62.0.3+build1-0ubuntu0.16.04.2",
        "63.0+build2-0ubuntu0.16.04.2",
        "63.0.3+build1-0ubuntu0.16.04.1",
        "64.0+build3-0ubuntu0.16.04.1",
        "65.0+build2-0ubuntu0.16.04.1",
        "65.0.1+build2-0ubuntu0.16.04.1",
        "66.0+build3-0ubuntu0.16.04.2",
        "66.0.1+build1-0ubuntu0.16.04.1",
        "66.0.2+build1-0ubuntu0.16.04.1",
        "66.0.3+build1-0ubuntu0.16.04.1",
        "66.0.4+build3-0ubuntu0.16.04.1",
        "66.0.5+build1-0ubuntu0.16.04.1",
        "67.0+build2-0ubuntu0.16.04.1",
        "67.0.1+build1-0ubuntu0.16.04.1",
        "67.0.2+build2-0ubuntu0.16.04.1",
        "67.0.3+build1-0ubuntu0.16.04.1",
        "67.0.4+build1-0ubuntu0.16.04.1",
        "68.0+build3-0ubuntu0.16.04.1",
        "68.0.1+build1-0ubuntu0.16.04.1",
        "68.0.2+build1-0ubuntu0.16.04.1",
        "69.0+build2-0ubuntu0.16.04.4",
        "69.0.1+build1-0ubuntu0.16.04.1",
        "69.0.2+build1-0ubuntu0.16.04.1",
        "70.0+build2-0ubuntu0.16.04.1",
        "70.0.1+build1-0ubuntu0.16.04.1",
        "71.0+build5-0ubuntu0.16.04.1",
        "72.0.1+build1-0ubuntu0.16.04.1",
        "72.0.2+build1-0ubuntu0.16.04.1",
        "73.0.1+build1-0ubuntu0.16.04.1",
        "74.0+build3-0ubuntu0.16.04.1",
        "74.0.1+build1-0ubuntu0.16.04.1",
        "75.0+build3-0ubuntu0.16.04.1",
        "76.0+build2-0ubuntu0.16.04.1",
        "76.0.1+build1-0ubuntu0.16.04.1",
        "77.0.1+build1-0ubuntu0.16.04.1",
        "78.0.1+build1-0ubuntu0.16.04.1",
        "78.0.2+build2-0ubuntu0.16.04.1",
        "79.0+build1-0ubuntu0.16.04.2",
        "80.0+build2-0ubuntu0.16.04.1",
        "80.0.1+build1-0ubuntu0.16.04.1",
        "81.0+build2-0ubuntu0.16.04.1",
        "81.0.2+build1-0ubuntu0.16.04.1",
        "82.0+build2-0ubuntu0.16.04.5",
        "82.0.2+build1-0ubuntu0.16.04.1",
        "82.0.3+build1-0ubuntu0.16.04.1",
        "83.0+build2-0ubuntu0.16.04.3",
        "84.0+build3-0ubuntu0.16.04.1",
        "84.0.1+build1-0ubuntu0.16.04.1",
        "84.0.2+build1-0ubuntu0.16.04.1",
        "85.0+build1-0ubuntu0.16.04.1",
        "85.0.1+build1-0ubuntu0.16.04.1",
        "86.0+build3-0ubuntu0.16.04.1",
        "86.0.1+build1-0ubuntu0.16.04.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-23981",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23982",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23983",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23984",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23985",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23986",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23987",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23988",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "firefox",
            "binary_version": "87.0+build3-0ubuntu0.18.04.2"
          },
          {
            "binary_name": "firefox-geckodriver",
            "binary_version": "87.0+build3-0ubuntu0.18.04.2"
          },
          {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "87.0+build3-0ubuntu0.18.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "firefox",
        "purl": "pkg:deb/ubuntu/firefox@87.0+build3-0ubuntu0.18.04.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "87.0+build3-0ubuntu0.18.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "56.0+build6-0ubuntu1",
        "57.0.1+build2-0ubuntu1",
        "59.0.1+build1-0ubuntu1",
        "59.0.2+build1-0ubuntu1",
        "60.0+build2-0ubuntu1",
        "60.0.1+build2-0ubuntu0.18.04.1",
        "60.0.2+build1-0ubuntu0.18.04.1",
        "61.0+build3-0ubuntu0.18.04.1",
        "61.0.1+build1-0ubuntu0.18.04.1",
        "62.0+build2-0ubuntu0.18.04.3",
        "62.0+build2-0ubuntu0.18.04.4",
        "62.0+build2-0ubuntu0.18.04.5",
        "62.0.3+build1-0ubuntu0.18.04.1",
        "63.0+build2-0ubuntu0.18.04.2",
        "63.0.3+build1-0ubuntu0.18.04.1",
        "64.0+build3-0ubuntu0.18.04.1",
        "65.0+build2-0ubuntu0.18.04.1",
        "65.0.1+build2-0ubuntu0.18.04.1",
        "66.0+build3-0ubuntu0.18.04.1",
        "66.0.1+build1-0ubuntu0.18.04.1",
        "66.0.2+build1-0ubuntu0.18.04.1",
        "66.0.3+build1-0ubuntu0.18.04.1",
        "66.0.4+build3-0ubuntu0.18.04.1",
        "66.0.5+build1-0ubuntu0.18.04.1",
        "67.0+build2-0ubuntu0.18.04.1",
        "67.0.1+build1-0ubuntu0.18.04.1",
        "67.0.2+build2-0ubuntu0.18.04.1",
        "67.0.3+build1-0ubuntu0.18.04.1",
        "67.0.4+build1-0ubuntu0.18.04.1",
        "68.0+build3-0ubuntu0.18.04.1",
        "68.0.1+build1-0ubuntu0.18.04.1",
        "68.0.2+build1-0ubuntu0.18.04.1",
        "69.0+build2-0ubuntu0.18.04.1",
        "69.0.1+build1-0ubuntu0.18.04.1",
        "69.0.2+build1-0ubuntu0.18.04.1",
        "70.0+build2-0ubuntu0.18.04.1",
        "70.0.1+build1-0ubuntu0.18.04.1",
        "71.0+build5-0ubuntu0.18.04.1",
        "72.0.1+build1-0ubuntu0.18.04.1",
        "72.0.2+build1-0ubuntu0.18.04.1",
        "73.0+build3-0ubuntu0.18.04.1",
        "73.0.1+build1-0ubuntu0.18.04.1",
        "74.0+build3-0ubuntu0.18.04.1",
        "74.0.1+build1-0ubuntu0.18.04.1",
        "75.0+build3-0ubuntu0.18.04.1",
        "76.0+build2-0ubuntu0.18.04.1",
        "76.0.1+build1-0ubuntu0.18.04.1",
        "77.0.1+build1-0ubuntu0.18.04.1",
        "78.0.1+build1-0ubuntu0.18.04.1",
        "78.0.2+build2-0ubuntu0.18.04.1",
        "79.0+build1-0ubuntu0.18.04.1",
        "80.0+build2-0ubuntu0.18.04.1",
        "80.0.1+build1-0ubuntu0.18.04.1",
        "81.0+build2-0ubuntu0.18.04.1",
        "81.0.2+build1-0ubuntu0.18.04.1",
        "82.0+build2-0ubuntu0.18.04.1",
        "82.0.2+build1-0ubuntu0.18.04.1",
        "82.0.3+build1-0ubuntu0.18.04.1",
        "83.0+build2-0ubuntu0.18.04.2",
        "84.0+build3-0ubuntu0.18.04.1",
        "84.0.1+build1-0ubuntu0.18.04.1",
        "84.0.2+build1-0ubuntu0.18.04.1",
        "85.0+build1-0ubuntu0.18.04.1",
        "85.0.1+build1-0ubuntu0.18.04.1",
        "86.0+build3-0ubuntu0.18.04.1",
        "86.0.1+build1-0ubuntu0.18.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-23981",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23982",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23983",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23984",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23985",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23986",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23987",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-23988",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "firefox",
            "binary_version": "87.0+build3-0ubuntu0.20.04.2"
          },
          {
            "binary_name": "firefox-geckodriver",
            "binary_version": "87.0+build3-0ubuntu0.20.04.2"
          },
          {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "87.0+build3-0ubuntu0.20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "firefox",
        "purl": "pkg:deb/ubuntu/firefox@87.0+build3-0ubuntu0.20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "87.0+build3-0ubuntu0.20.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "69.0.3+build1-0ubuntu1",
        "70.0+build2-0ubuntu1",
        "70.0+build2-0ubuntu2",
        "70.0.1+build1-0ubuntu2",
        "71.0+build2-0ubuntu2",
        "71.0+build5-0ubuntu1",
        "72.0.1+build1-0ubuntu1",
        "72.0.2+build1-0ubuntu1",
        "73.0+build1-0ubuntu1",
        "73.0+build2-0ubuntu1",
        "73.0+build3-0ubuntu1",
        "73.0.1+build1-0ubuntu1",
        "74.0+build1-0ubuntu1",
        "74.0+build2-0ubuntu1",
        "74.0+build2-0ubuntu2",
        "74.0+build3-0ubuntu1",
        "75.0+build3-0ubuntu1",
        "76.0+build2-0ubuntu0.20.04.1",
        "76.0.1+build1-0ubuntu0.20.04.1",
        "77.0.1+build1-0ubuntu0.20.04.1",
        "78.0.1+build1-0ubuntu0.20.04.1",
        "78.0.2+build2-0ubuntu0.20.04.1",
        "79.0+build1-0ubuntu0.20.04.1",
        "80.0+build2-0ubuntu0.20.04.1",
        "80.0.1+build1-0ubuntu0.20.04.1",
        "81.0+build2-0ubuntu0.20.04.1",
        "81.0.2+build1-0ubuntu0.20.04.1",
        "82.0+build2-0ubuntu0.20.04.1",
        "82.0.2+build1-0ubuntu0.20.04.1",
        "82.0.3+build1-0ubuntu0.20.04.1",
        "83.0+build2-0ubuntu0.20.04.1",
        "84.0+build3-0ubuntu0.20.04.1",
        "84.0.1+build1-0ubuntu0.20.04.1",
        "84.0.2+build1-0ubuntu0.20.04.1",
        "85.0+build1-0ubuntu0.20.04.1",
        "85.0.1+build1-0ubuntu0.20.04.1",
        "86.0+build3-0ubuntu0.20.04.1",
        "86.0.1+build1-0ubuntu0.20.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Multiple security issues were discovered in Firefox. If a user were\ntricked into opening a specially crafted website, an attacker could\npotentially exploit these to cause a denial of service, obtain sensitive\ninformation, or execute arbitrary code. (CVE-2021-23981, CVE-2021-23982,\nCVE-2021-23983, CVE-2021-23987, CVE-2021-23988)\n\nIt was discovered that extensions could open popup windows with control\nof the window title in some circumstances. If a user were tricked into\ninstalling a specially crafted extension, an attacker could potentially\nexploit this to spook a website and trick the user into providing\ncredentials. (CVE-2021-23984)\n\nIt was discovered that the DevTools remote debugging feature could be\nenabled without an indication to the user. If a local attacker could\nmodify the browser configuration, a remote attacker could potentially\nexploit this to obtain sensitive information. (CVE-2021-23985)\n\nIt was discovered that extensions could read the response of cross\norigin requests in some circumstances. If a user were tricked into\ninstalling a specially crafted extension, an attacker could potentially\nexploit this to obtain sensitive information. (CVE-2021-23986)\n",
  "id": "USN-4893-1",
  "modified": "2026-04-22T07:36:59Z",
  "published": "2021-03-25T22:36:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4893-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23981"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23982"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23983"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23984"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23985"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23986"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23987"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-23988"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "firefox vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-23981",
    "UBUNTU-CVE-2021-23982",
    "UBUNTU-CVE-2021-23983",
    "UBUNTU-CVE-2021-23984",
    "UBUNTU-CVE-2021-23985",
    "UBUNTU-CVE-2021-23986",
    "UBUNTU-CVE-2021-23987",
    "UBUNTU-CVE-2021-23988"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.