vBulletin 3.8.4 PL2 breaking cookie authentication from non-VB Pages

[evannn]

Hi Friends,

I have filed a support ticket with vBulletin and they responded.

If you are on 3.8.4 PL2,
Go into includes/functions.php, around line 34, you should see a
define('COOKIE_SALT', 'XXXX');

What I did was:
Replace this line with the same line from 3.8.4 PL1

I confirm this resolved the problem. But I am concerned whether does this has any security implications.

Thanks