The DoLeads Integrator WordPress plugin through 0.65, wp2epub WordPress plugin through 0.65 have been seen to be used to achieve RCE, once they are added adding to a blog, for example using a vulnerability where unclosed extensions from wordpress.org can be installed by unauthorized users.
Exploitability
AV:NAC:HPR:NUI:NScope
S:CImpact
C:HI:HA:H9/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H