Not a problem. The vast majority of exploits have pretty much always been found by the 'nix crowd and patches posted as fast as possible, while MS has traditionally been reluctant to even admit any issues exist, with the few critical ones being quietly fixed at the next 'update' instead.
I think it was only a couple of years ago that there were over thirty different exploits discovered on the 'doze OS within a single week, and while the 'nix coders worked night and day to work out and issue patches, I believe MS only publicly issued some belated patches totaling less than ten in all, and never acknowledged any others -since the exploits were deemed 'non-critical' and the fixes were already out there. Why sully the name when you do not have to?
That might help if the exploit is in the third-party browser you are using (Firefox or Chrome) but no one can post a patch for Windows XP itself other than Microsoft.