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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 68.5 | 68.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | thunderbird | 1:68.5.0-1 | — |
| Debian 13 | thunderbird | 1:68.5.0-1 | — |
| Debian 12 | thunderbird | 1:68.5.0-1 | — |
| Debian 10 | thunderbird | 1:68.5.0-1~deb10u1 | DSA-4625-1 |
| Debian 9 | thunderbird | 1:68.5.0-1~deb9u1 | DSA-4625-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | thunderbird | 1:68.5.0-1~deb8u1 | DLA-2104-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | thunderbird | 1:68.7.0+build1-0ubuntu0.18.04.1 | USN-4328-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:68.7.0+build1-0ubuntu0.16.04.2 | USN-4335-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | thunderbird | 68.5.0-1.el8_1 | RHSA-2020:0577 |
| RHEL 7 | thunderbird | 68.5.0-1.el7_7 | RHSA-2020:0576 |
| RHEL 6 | thunderbird | 68.5.0-1.el6_10 | RHSA-2020:0574 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.0 E4S | thunderbird | 68.5.0-1.el8_0 | RHSA-2020:0565 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | MozillaThunderbird | 68.5.0-3.71.1 | SUSE-SU-2020:0385-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
| openSUSE Leap 15.1 | MozillaThunderbird | 68.5.0-lp151.2.25.1 | openSUSE-SU-2020:0231-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | thunderbird | 68.5.0-r0 | — |
| Alpine v3.22 | thunderbird | 68.5.0-r0 | — |
| Alpine v3.21 | thunderbird | 68.5.0-r0 | — |
| Alpine v3.20 | thunderbird | 68.5.0-r0 | — |
| Alpine v3.19 | thunderbird | 68.5.0-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | thunderbird | 68.5.0-r0 | — |
| Alpine v3.17 | thunderbird | 68.5.0-r0 | — |
| Alpine v3.16 | thunderbird | 68.5.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 68.5.0-1.amzn2.0.1 | ALAS2-2020-1408 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | thunderbird | 68.5.0-1.0.1.el8_1 | ELSA-2020-0577 |
| Oracle Linux 7 | thunderbird | 68.5.0-1.0.1.el7_7 | ELSA-2020-0576 |
Advisories 14
- RHSA-2020:0576 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:0574 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4328-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4335-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4625-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2104-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2020:0231-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0385-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2020:0577 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2020:0565 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ALAS2-2020-1408 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 25, 2020
- ELSA-2020-0577 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 26, 2020
- ELSA-2020-0576 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 25, 2020
References
- https://www.mozilla.org/security/advisories/mfsa2020-07/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1606619
- GLSA-202003-10 vendor-advisory
- USN-4328-1 vendor-advisory
- USN-4335-1 vendor-advisory