Description
WordPress Plugin Newsletter-Send awesome emails from WordPress is prone to a vulnerability that lets remote attackers inject arbitrary formulas into CSV files. Attackers can possibly exploit this issue to execute arbitrary commands on the victim's system, by the use of Microsoft Excel DDE function, or to leak data via maliciously injected hyperlinks. WordPress Plugin Newsletter-Send awesome emails from WordPress version 6.5.3 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 6.5.4 or latest
References
https://fortiguard.com/zeroday/FG-VD-20-045
https://plugins.svn.wordpress.org/newsletter/trunk/readme.txt