CVE-2021-4126

EPSS 0.16%
Published 22.12.2022 20:15:11
Last modified 16.04.2025 16:15:18
Source security@mozilla.org
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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.

Affected products Warnungen 0 Metrics 3 CWE 0 References 5

Data is provided by the National Vulnerability Database (NVD)

Mozilla ≫ Thunderbird Version < 91.4.1

Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.

EPSS Metriken
Type	Source	Score	Percentile
EPSS	FIRST.org	0.16%	0.371

CVSS Metriken
Source	Base Score	Exploit Score	Impact Score	Vector string
nvd@nist.gov	6.5	2.8	3.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
134c704f-9b21-4f2e-91b3-4a467353bcc0	6.5	2.8	3.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

https://bugzilla.mozilla.org/show_bug.cgi?id=1732310

Vendor Advisory

Issue Tracking

Permissions Required

https://www.mozilla.org/security/advisories/mfsa2021-55/

Vendor Advisory

https://nvd.nist.gov/vuln/detail/CVE-2021-4126

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2021-4126

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2021-4126

EUVD