CVE-2020-6794
MEDIUMDescription
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.
How to fix
This Ubuntu release reached end-of-life on 2021-04-02.
This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 61% of all known CVEs.
References
Related Vulnerabilities
Other CWE-312 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-50719 | High | 7.5 | 84% | - | Fix |
| CVE-2022-26148 | Critical | 9.8 | 53% | - | Fix |
| CVE-2020-24577 | High | 7.5 | 19% | - | Fix |
| CVE-2021-27140 | High | 7.5 | 19% | - | - |
| CVE-2021-27176 | High | 7.5 | 19% | - | - |
| CVE-2021-27174 | High | 7.5 | 19% | - | - |
Common questions
How do I fix CVE-2020-6794?
Published advisories record a fix for 5 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2020-6794 being actively exploited?
Not that we know of. CVE-2020-6794 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 61% of all scored CVEs.
How severe is CVE-2020-6794?
CVE-2020-6794 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2020-6794 affect?
Published advisories record a fix for thunderbird (Amazon), thunderbird-debuginfo (Amazon), thunderbird (Debian), thunderbird (Ubuntu), and 1 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.