Squirrelmail authenticated user variable overwriting A bug was fixed in squirrelmail 1.4.8 which could allow a logged in user to overwrite random variables in compose.php with arbitrary data. This may allow a user to read or write another users preferences or mail attachments. More information can be found here: http://www.squirrelmail.org/security/issue/2006-08-11
squirrelmail-1.4.8-1.fc5 has been pushed for fc5, which should resolve this issue. If these problems are still present in this version, then please make note of it in this bug report.