If a user saved passwords before Firefox 58 and then later set a master password, an unencrypted copy of these passwords is still…

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.

Scores

EPSS (exploitation in 30 days)

0.46% · top 60% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

• Setting a master password post-Firefox 58 does not delete unencrypted previously stored passwords
• CWE-522 (opens in a new tab)All about CWE-522 and its CVEs

Affected products

• Mozilla · Firefox

  • affected unspecified – < 62

• Mozilla · Firefox ESR

  • affected unspecified – < 60.2.1

• Mozilla · Thunderbird

  • affected unspecified – < 60.2.1

References (18)

• GLSA-201810-01 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• [debian-lts-announce] 20181112 [SECURITY] [DLA 1575-1] thunderbird security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• GLSA-201811-13 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• https://bugzilla.mozilla.org/show_bug.cgi?id=1475775 (opens in a new tab)x_refsource_CONFIRMx_transferred
• DSA-4327 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• https://www.mozilla.org/security/advisories/mfsa2018-23/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2018:2835 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3403 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://www.mozilla.org/security/advisories/mfsa2018-20/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• 1041610 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 105276 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• 1041701 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• RHSA-2018:3458 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• DSA-4304 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• RHSA-2018:2834 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3793-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• https://www.mozilla.org/security/advisories/mfsa2018-25/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• USN-3761-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2018-12383](https://trackcve.app/badge/CVE-2018-12383.svg)](https://trackcve.app/cve/CVE-2018-12383)

Record last updated 5 Aug 2024, 08:30 UTC.