Plugin inspection:

Crayon Syntax Highlighter

Potentially unsafe

Last revised:

Confidence: Medium
This plugin has been given a short, targeted code review.

Before using this plugin, you should very carefully consider its potential problems and should conduct a thorough assessment. Read more about this recommendation.


  • The options form doesn’t escape the values it stores, but it’s not vulnerable because the form uses nonce fields
  • Uses mail() instead of wp_mail()
  • The CSS editor doesn’t appear to use nonce values and so it may contain a CSRF vulnerability

Reason for the 'Potentially unsafe' result

The plugin contains or is likely to contain a vulnerability which could be exploited by an end user and which would compromise the site’s confidentiality, integrity or availability:

Likely to contain a CSRF vuln in the “theme editor” (unrelated to the WordPress theme editor).

Failure criteria

  • Failure to use available core functionality
  • Lack of proper output escaping

Read more about our failure criteria.