CVE catalog

CVE-2021-29963

UBUNTU-

[CVE catalog]

Address bar search suggestions in private browsing mode were re-using session data from normal mode. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 89.

Severity
Medium · CVSS 4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Published
Updated
Source
[NVD] · [CVE record]
EPSS
0.33% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / releasePackageVersionStatusSource
Ubuntu22.04mozjs7878.13.0-1Affected[UBUNTU-CVE-2021-29963]
Ubuntu22.04mozjs7878.15.0-2Affected[UBUNTU-CVE-2021-29963]
Ubuntu22.04mozjs7878.15.0-4ubuntu1Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs5252.9.1-1build1Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs5252.9.1-1ubuntu3Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.5.0-1~fakesyncAffected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.5.0-2~fakesyncAffected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.6.0-1Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.6.0-1ubuntu1Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs3838.8.0~repack1-0ubuntu1Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs3838.8.0~repack1-0ubuntu3Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs3838.8.0~repack1-0ubuntu4Affected[UBUNTU-CVE-2021-29963]

Showing 12 observations. All 16 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Ubuntu18.04mozjs3838.8.0~repack1-0ubuntu1Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs3838.8.0~repack1-0ubuntu3Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs3838.8.0~repack1-0ubuntu4Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs5252.3.1-0ubuntu3Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs5252.3.1-7fakesync1Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs5252.8.1-0ubuntu0.18.04.1Affected[UBUNTU-CVE-2021-29963]
Ubuntu18.04mozjs5252.9.1-0ubuntu0.18.04.1Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs5252.9.1-1build1Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs5252.9.1-1ubuntu3Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.5.0-1~fakesyncAffected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.5.0-2~fakesyncAffected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.6.0-1Affected[UBUNTU-CVE-2021-29963]
Ubuntu20.04mozjs6868.6.0-1ubuntu1Affected[UBUNTU-CVE-2021-29963]
Ubuntu22.04mozjs7878.13.0-1Affected[UBUNTU-CVE-2021-29963]
Ubuntu22.04mozjs7878.15.0-2Affected[UBUNTU-CVE-2021-29963]
Ubuntu22.04mozjs7878.15.0-4ubuntu1Affected[UBUNTU-CVE-2021-29963]
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "mozjs52",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "52.3.1-0ubuntu3",
        "52.3.1-7fakesync1",
        "52.8.1-0ubuntu0.18.04.1",
        "52.9.1-0ubuntu0.18.04.1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-29963",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-29963",
      "provider_updated_at": "2026-04-22T12:51:30.995269Z"
    },
    {
      "name": "mozjs38",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "38.8.0~repack1-0ubuntu1",
        "38.8.0~repack1-0ubuntu3",
        "38.8.0~repack1-0ubuntu4"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-29963",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-29963",
      "provider_updated_at": "2026-04-22T12:51:30.995269Z"
    },
    {
      "name": "mozjs68",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "68.5.0-1~fakesync",
        "68.5.0-2~fakesync",
        "68.6.0-1",
        "68.6.0-1ubuntu1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-29963",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-29963",
      "provider_updated_at": "2026-04-22T12:51:30.995269Z"
    },
    {
      "name": "mozjs52",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "52.9.1-1build1",
        "52.9.1-1ubuntu3"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-29963",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-29963",
      "provider_updated_at": "2026-04-22T12:51:30.995269Z"
    },
    {
      "name": "mozjs78",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "78.13.0-1",
        "78.15.0-2",
        "78.15.0-4ubuntu1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-29963",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-29963",
      "provider_updated_at": "2026-04-22T12:51:30.995269Z"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]