The WPMU defender plugin has flagged up your plugin as containing suspicious code. It does say that it could be a false positive and in the past i have found this to be the case with other plugins but it also tells me that i should contact the developer to be sure.
The message I get says….
We’ve uncovered suspicious code in /wp-content/plugins/responsive-lightbox/includes/class-galleries.php. The red highlighted code is the flagged code and the green is the cleaned up code. Note that these warnings can be false positives, so consult your developer before taking action.”
It then gives the specific code but as I can’t load a screen shot you won’t be able to see the green and red highlights as mentioned din the error message.
If you supply me a place I can email to then I can supply a screenshot which will maintain the sections that are red and green as referred to.
If you can advise if it all look correct that would be great.