I can’t rule out false positives, but somebody using g-data-virusscanner reported the same issue, and we definitely quarantined files in our browser directory structures.
That would be nice, and we can’t rule it out. However, our virus programs also quarantined a Trojan file on our local computers after accessing the site, so we strongly suspect there’s an issue.
We also have run similar scans and not found an issue – but I don’t believe those scans can effectively test the dashboard screens. Our regular pages work fine.
This problem has been reported by others at wordpress.com, in the following thread: https://en.forums.wordpress.com/topic/virus-trojanscript-644049-engine-a?replies=8
I noticed the same thing. Our Member Mouse didn’t work correctly until I took your tip and deactivated the WordPress SEO plugin. Frustrating.
Yoast has typically put out a strong product; hopefully if they’re causing the problem, they’ll come up with a solution quickly.