What is the difference between the severity and priority of a bug?

Question

Accepted Answer

Severity is the impact of a bug on the system while priority is the urgency of fixing it.

Severity is the measure of how much a bug affects the system's functionality or performance.
Priority is the measure of how urgently a bug needs to be fixed.
A high severity bug may not have a high priority if it does not affect critical functionality.
A low severity bug may have a high priority if it affects critical functionality.
Both severity and priority are used to prioritize bug fixes.
Examples: A spelling mistake in a non-critical area may have low severity and low priority. A security vulnerability may have high severity and high priority.