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OpenAdvisories
Unscored USN-3801-1 12 CVEs

firefox vulnerabilities

Published Oct 24, 2018 · Updated Apr 22, 2026

Summary

Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass CSP
restrictions, spoof the protocol registration notification bar, leak
SameSite cookies, bypass mixed content warnings, or execute arbitrary
code. (CVE-2018-12388, CVE-2018-12390, CVE-2018-12392, CVE-2018-12393,
CVE-2018-12398, CVE-2018-12399, CVE-2018-12401, CVE-2018-12402,
CVE-2018-12403)

Multiple security issues were discovered with WebExtensions in Firefox.
If a user were tricked in to installing a specially crafted extension, an
attacker could potentially exploit these to bypass domain restrictions,
gain additional privileges, or run content scripts in local pages without
permission. (CVE-2018-12395, CVE-2018-12396, CVE-2018-12397)

Fixed packages 3

ReleasePackageFixed in
Ubuntu · 14.04 LTS 14.04:LTS firefox 63.0+build2-0ubuntu0.14.04.2
Ubuntu · 16.04 LTS 16.04:LTS firefox 63.0+build2-0ubuntu0.16.04.2
Ubuntu · 18.04 LTS 18.04:LTS firefox 63.0+build2-0ubuntu0.18.04.2

Vulnerabilities 12

References

  • report
    https://ubuntu.com/security/CVE-2018-12388
  • report
    https://ubuntu.com/security/CVE-2018-12390
  • report
    https://ubuntu.com/security/CVE-2018-12392
  • report
    https://ubuntu.com/security/CVE-2018-12393
  • report
    https://ubuntu.com/security/CVE-2018-12395
  • report
    https://ubuntu.com/security/CVE-2018-12396
  • report
    https://ubuntu.com/security/CVE-2018-12397
  • report
    https://ubuntu.com/security/CVE-2018-12398
  • report
    https://ubuntu.com/security/CVE-2018-12399
  • report
    https://ubuntu.com/security/CVE-2018-12401
  • report
    https://ubuntu.com/security/CVE-2018-12402
  • report
    https://ubuntu.com/security/CVE-2018-12403