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CVE-2021-29957

Mozilla: Partial protection of inline OpenPGP message not indicated

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Severity

Low

Red Hat Product Security

3.5

CVSS 3.1

Review impact separately from score.

Published · May 17, 2021

Updated · November 22, 2025

Description

If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird < 78.10.2.

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 3.1 · 3.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

CWE-347 · Improper Verification of Cryptographic Signature