VULNERABILITY INTELLIGENCE

CVE-2022-1520

CVSS score4.3 MEDIUM

EPSS probability0.28%

CISA KEVNot currently listed

Published2022-12-22

Last modified2026-06-17

Description

When viewing an email message A, which contains an attached message B, where B is encrypted or digitally signed or both, Thunderbird may show an incorrect encryption or signature status. After opening and viewing the attached message B, when returning to the display of message A, the message A might be shown with the security status of message B. This vulnerability affects Thunderbird < 91.9.