Seems that the latest TaiG jailbreak comes with a price, it exposes a vulnerable security flaw on your device. If you have jailbroken your device recently then take care with any jailbreak apps or tweaks you install until this is fixed.
More information can be found here: TaiG Jailbreak has a security flaw that allows any app to become root
More information can be found here: TaiG Jailbreak has a security flaw that allows any app to become root