How do I bring back an ignored vulnerability?

To remove the ignored status from a vulnerability follow the steps below:

1. Log in to Security Center.
2. Click Vulnerability Manager in the main menu.
3. Click Network & Web.
4. Click Filter. 
5. Select Ignored/Disabled in the filter options.
6. On the row of the listed vulnerability, click Ignored/Disabled for all assets
7. Click Remove ignore.
8. Done!