CVE-2023-50761 Information

Description

The signature of a digitally signed S/MIME email message may optionally specify the signature creation date and time. If present Thunderbird did not compare the signature creation date with the message date and time and displayed a valid signature despite a date or time mismatch. This could be used to give recipients the impression that a message was sent at a different date or time. This vulnerability affects Thunderbird < 115.6.

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1865647 https://www.mozilla.org/security/advisories/mfsa2023-55/