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.
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: