CVE-2020-12397

MediumCVSS 4.3/10Last modified Jun 17, 2026

Description

By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. This vulnerability affects Thunderbird < 68.8.0.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-346

Affected software

No affected versions have been published.

Timeline

Published: May 22, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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