This plugin contains a file inclusion vulnerability that is exploitable by an unauthenticated user. It does not appear to have any mechanism to upload malicious code, so is not vulnerable in isolation. However, many other plugins do have vulnerabilities that would allow files to be uploaded or modified. Use of this plugin should therefore be considered very carefully.
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: