CVE-2018-12383If a user saved passwords before Firefox 58 and then later set a master password, an unencrypted copy of these passwords is still…
- 5.5MediumCVSS base score
- 0.46%Exploitation in 30 daysEPSS · top 60% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mozilla
- 4 months later
· 4 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.46% · top 60% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected unspecified – < 62
- affected unspecified – < 60.2.1
- affected unspecified – < 60.2.1
References
References18
- 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)
- EUVD EUVD-2018-4357 (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
[](https://cveledger.app/cve/CVE-2018-12383)Record last updated .