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CVE-2020-6794
If a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords is still…
Medium6.5EPSS 1.0%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
If a user saved passwords before Thunderbird 60 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 Thunderbird 60. 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 Thunderbird < 68.5.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.0% · top 36% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
- Setting a master password post-Thunderbird 52 does not delete unencrypted previously stored passwords
- CWE-312 (opens in a new tab)All about CWE-312 and its CVEs
- CWE-459 (opens in a new tab)All about CWE-459 and its CVEs
- CWE-522 (opens in a new tab)All about CWE-522 and its CVEs
Affected products
- affected unspecified – < 68.5
References (5)
- https://www.mozilla.org/security/advisories/mfsa2020-07/ (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1606619 (opens in a new tab)x_refsource_MISCx_transferred
- GLSA-202003-10 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- USN-4328-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-4335-1 (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
[](https://trackcve.app/cve/CVE-2020-6794)Record last updated .