Vulnerabilities

By downloading a file with the .fileloc extension, a semi-privileged extension could launch an arbitrary application on the user's computer.

When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash.

If a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords is still accessible.

When processing an email message with an ill-formed envelope, Thunderbird could read data from a random memory location.

When deriving an identifier for an email message, uninitialized memory was used in addition to the message contents.