Security for Confluence allows for creation of custom scanning rules using regular expressions.

Only Confluence Administrators can access these settings.

To create a rule, go to Settings→ Security for Confluence Settings → Global Security Rules → Custom rules.

Our application uses the built-in JDK java regex library (Java 8), which you can compare to other regex engines here.

Security for Confluence imposes hard limits on how much memory a rule can use and how long a rule can take to scan a page fragment. Scanning rules which exceed these limits will be automatically disabled, and the scan will be marked as failed.

If a secret in a single page fragment matches more than one rule (built-in or custom), only the first match will be reported.

Here are some example rules:

Bitcoin Address

^[13][a-km-zA-HJ-NP-Z0-9]{26,33}$	
NONE

Youtube Links

<a\s+(?:[^>]*)href=\"((?:https|http):\/\/\w{0,3}.youtube+\.\w{2,3}\/watch\?v=[\w-]{11})">(?:.*?)<\/a>
CODE