Vibers are a group of meta-humans who have a link to the energy of the multiverse. This enables them to see places and people in time and space and travel across the dimensions.
History
There are several vibers throughout the multiverse.
Cisco Ramon received his powers after the Particle Accelerator explosion on Earth 1 however they did not manifest until Barry changed the timeline and prevented Mark Mardon from destroying Central City. The resultant Time Rupture caused Cisco's powers to manifest. Since then he has grown in the proficiency of his powers able to effortlessly open breaches and use the energy in combat.
On Earth 2, the Particle Accelerator released radiation under Central City creating metahumans. Among those effected was Cisco Ramon's Earth 2 counterpart Reverb. This viber was so gifted he could destroy a nervous system in one blast. He used his powers on Earth 2 under the employment of Zoom.
On Earth 19 through unknown circumstances, Gypsy received dimensional powers which she used in her duties as a collector. It is implied that others have the same powers in their duties as collectors.