How dangerous is XSS?

Related questions

1. What is XSS testing?
2. What is XSS payload?
3. Why is SQL injection dangerous?
4. Does same origin prevent XSS?
5. What is XSS stored?
6. What can an attacker do with XSS?
7. What is blind XSS?
8. What is the meaning of SQL injection?
9. What is stored XSS attack?
10. What is a reflected XSS attack?

Tags

1. #example
2. #since
3. #popular
4. #facing
5. #board
6. #social
7. #exploited
8. #dangerous
9. #profile
10. #public
11. #pages
12. #especially
13. #stored
14. #imagine
15. #website
16. #media
17. #effect
18. #vulnerability
19. #message
20. #vulnerable