Spam protection, AntiSpam, FireWall by CleanTalk is installed on more than 100,000 sites, and is mainly used to weed out spam and trash comments on website discussion boards.

Join Threatpost for “Fortifying Your Business Against Ransomware, DDoS & Cryptojacking Attacks” a LIVE roundtable event on Wednesday, May 12 at 2:00 PM EDT for this FREE webinar sponsored by Zoho ManageEngine.

According to Wordfence, the issue (CVE-2021-24295, which carries a high-severity CVSS vulnerability rating of 7.5 out of 10) arises thanks to how it performs that filtering. It maintains a blocklist and tracks the behavior of different IP addresses, including the user-agent string that browsers send to identify themselves.

#web security #anti-spam #wordpress #wordpress plugin