CVE-2020-6794
Mozilla: Setting a master password post-Thunderbird 52 does not delete unencrypted previously stored passwords
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · February 11, 2020
Updated · November 22, 2025
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.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 6.1CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE-312 · Cleartext Storage of Sensitive Information