Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-23991

If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 44.4%
CVSS Severity
CVSS v3 Score 6.8
CVSS v2 Score 4.0
Products affected by CVE-2021-23991


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