16 Sep

WordPress Plugin Security Review: Nginx Cache

For our 34th security review of a WordPress plugin based on the voting of our customers, we reviewed the plugin Nginx Cache.

If you are not yet a customer of the service, once you sign up for the service as a paying customer you can start suggesting and voting on plugins to get security reviews. For those already using the service that haven’t already suggested and voted for plugins to receive a review, you can start doing that here. You can use our tool for doing limited automated security checks of plugins to see if plugins you are using have possible issues that would make them good candidates to get a review. You can also order a review of a plugin separately from our service.

The review was done on version 1.0.4 of Nginx Cache. We checked for the following issues during as part of our standard review:

  • Insecure file upload handling (this is the cause of the most exploited type of vulnerability, arbitrary file upload)
  • Deserialization of untrusted data
  • Security issues with functions accessible through WordPress’ AJAX functionality (those have and continued to be a common source of disclosed vulnerabilities)
  • Security issues with functions accessible through WordPress’ REST API (those have started to be a source of disclosed vulnerabilities)
  • Persistent cross-site scripting (XSS) vulnerabilities in the frontend portions of the plugin and in the admin portions accessible to users with the Author role or below
  • Cross-site request forgery (CSRF) vulnerabilities in the admin portion of the plugin
  • SQL injection vulnerabilities (the code that handles requests to the database)
  • Reflected cross-site scripting (XSS) vulnerabilities
  • Security issues with functions accessible through any of the plugin’s shortcodes
  • Security issues with functions accessible through the admin_action action
  • Security issues with functions accessible through the admin_init action
  • Security issues with functions accessible through the admin_post action
  • Security issues with import/export functionality
  • Security issues with usage of the is_admin() function
  • Security issues with usage of the add_option(), delete_option(), and update_option() functions
  • Security issues with usage of the extract() function
  • Host header injection vulnerabilities
  • Lack of protection against unintended direct access of PHP files
  • Insecure and unwarranted requests to third-party websites
  • Any additional possible issues identified by our Plugin Security Checker

Results

We found no issues with any of the checked items in version 1.0.4 of Nginx Cache.

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