CVE-2018-12383
This could allow the exposure of stored password data outside of user expectations.
Does this matter?
Lower severity and a low EPSS score (0.46%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.46% probability · 40th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-522
- Affected
- redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · debian/debian linux · canonical/ubuntu linux · mozilla/firefox · mozilla/firefox esr · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/105276Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041610Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041701Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2834Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2835Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3403Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3458Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1475775Exploit, Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3761-1/Third Party Advisory
- https://usn.ubuntu.com/3793-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4304Third Party Advisory
- https://www.debian.org/security/2018/dsa-4327Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-20/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-23/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-25/Vendor Advisory
- http://www.securityfocus.com/bid/105276Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041610Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041701Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2834Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2835Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3403Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3458Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1475775Exploit, Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3761-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.