VDB
CVE-2021-4126
CVE-2021-4126
PUBLISHED
CVSS 6.5 MEDIUM
When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature. Starting with Thunderbird version 91.4.1, only the signature that belongs to the top level MIME part will be considered for the displayed status. This vulnerability affects Thunderbird < 91.4.1.
EPSS 0.21% · 43.3th percentile
Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS Score
0.21%
43.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| mozilla | thunderbird | 0 |
| Mozilla | Thunderbird | * |
Timeline
- Jan 12, 2022 CVE Published
- Dec 23, 2022 EPSS Score
- Feb 2, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- Mar 16, 2023 EPSS Score
- Apr 26, 2023 EPSS Score
- Jun 7, 2023 EPSS Score
- Jul 18, 2023 EPSS Score
- Aug 29, 2023 EPSS Score
- Oct 9, 2023 EPSS Score
- Nov 20, 2023 EPSS Score
- Dec 31, 2023 EPSS Score
References
- https://www.mozilla.org/security/advisories/mfsa2021-55/ url
- https://bugzilla.mozilla.org/show_bug.cgi?id=1732310 url
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-55/ advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-4126 advisory
- https://www.mozilla.org/security/advisories/mfsa2021-55 url