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TI-2018-08883 Aliases CVE-2018-12383GHSA-cvcq-m8cv-7r6g

Insufficiently protected credentials in Mozilla Firefox

Priority LOW 25CWE-522Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 15 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-522.

Summary

If a user saved passwords before Firefox 58 and then later set a master password, an unencrypted copy of these passwords is still accessible. This is because the older stored password file was not deleted when the data was copied to a new format starting in Firefox 58. The new master password is added only on the new file. This could allow the exposure of stored password data outside of user expectations. This vulnerability affects Firefox < 62, Firefox ESR < 60.2.1, and Thunderbird < 60.2.1.

Why it matters now

EPSS 0.0046 40th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Firefox (Mozilla): 62Firefox ESR (Mozilla): 60.2.1+1 more productRed Hat: 4 advisoriesRed Hat: 15 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 6262Patch availableCNA
MozillaFirefox ESRbefore 60.2.160.2.1Patch availableCNA
MozillaThunderbirdbefore 60.2.160.2.1Patch availableCNA
  • Firefox VendorMozilla Affected before 62 Fixed in 62 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 60.2.1 Fixed in 60.2.1 Patch available CNA
  • Thunderbird VendorMozilla Affected before 60.2.1 Fixed in 60.2.1 Patch available CNA

CPE configurations NVD · 18

CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Show 8 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 62.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 60.2.1VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 60.2.1VulnerableMozilla
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 62.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 60.2.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.2.1 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 62
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 60.2.1
  • Fix · CNA Thunderbird (Mozilla) Fixed in 60.2.1

Red Hat 4 advisories

  • RHSA-2018:3458 Released 2018-11-05 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-60.2.1-4.el7_5
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-60.2.1-4.el7_5
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-60.2.1-4.el7_5
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird-60.2.1-4.el7_5
  • RHSA-2018:3403 Released 2018-10-30 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Desktop (v. 6) thunderbird-60.2.1-5.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-60.2.1-5.el6
    • Red Hat Enterprise Linux Workstation (v. 6) thunderbird-60.2.1-5.el6
  • RHSA-2018:2835 Released 2018-09-27 · Red Hat rating Moderate
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-60.2.1-1.el7_5
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.2.1-1.el7_5
    • Red Hat Enterprise Linux Server (v. 7) firefox-60.2.1-1.el7_5
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.2.1-1.el7_5
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-60.2.1-1.el7_5
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.2.1-1.el7_5
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.2.1-1.el7_5
Show 1 more Red Hat advisories
  • RHSA-2018:2834 Released 2018-09-27 · Red Hat rating Moderate
    firefox security update
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-60.2.1-1.el6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.2.1-1.el6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.2.1-1.el6
    • Red Hat Enterprise Linux Server (v. 6) firefox-60.2.1-1.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.2.1-1.el6
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-60.2.1-1.el6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.2.1-1.el6

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — USN-3761-1

    5 records Highest priority Priority MEDIUM 4 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-08879 Use after free in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08878 Use after free in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08877 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    Show all 5 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — USN-3793-1

    5 records Highest priority Priority MEDIUM 3 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2018-08879 Use after free in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08878 Use after free in Mozilla FirefoxPriority MEDIUM 48
    • TI-2018-08877 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    Show all 5 records → Advisory →
Show 3 more groups
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2018:2834

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2018-08885 Improper input validation in Mozilla ThunderbirdPriority LOW 31
    Show all 2 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2018:2835

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2018-08885 Improper input validation in Mozilla ThunderbirdPriority LOW 31
    Show all 2 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — DSA-4304

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2018-08885 Improper input validation in Mozilla ThunderbirdPriority LOW 31
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:2835, RHSA-2018:3458
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:2835
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2018:2834, RHSA-2018:3403
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2018:2834
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2018:2834
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:2834
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:2835
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2018:2834, RHSA-2018:3403
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:2835, RHSA-2018:3458
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:2834, RHSA-2018:3403
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:2835, RHSA-2018:3458
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2018:2834
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:2835
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:2835
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:3458
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-12383
  2. 2026-10-03 Alias added: GHSA-cvcq-m8cv-7r6g

References

Exploit 1

Advisory 14

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences