Enigmail before 2.0.11 allows PGP signature spoofing: for an inline PGP message, an attacker can cause the product to display a “correctly signed” message indication, but display different unauthenticated text.
lists.opensuse.org/opensuse-security-announce/2019-06/msg00061.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AVNTEF3WSOOQYKMIPEH7F77UPXES5BU5/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CYWBJHSBBLAHKMRWDWH2XXQDYAGDHB5I/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GHC5WDQ47FQSL5CTGQUYIHVC3RNZ7UH5/
sourceforge.net/p/enigmail/bugs/983/
www.enigmail.net/index.php/en/download/changelog