October 25, 2023 at 12:16PM Winter Vivern, a Russia-linked advanced persistent threat (APT) actor, has been exploiting a zero-day vulnerability in the Roundcube webmail server to target government entities and a think tank in Europe. Winter Vivern, also known as TA473, focuses on espionage and has previously targeted NATO countries. It has been targeting email … Read more
October 25, 2023 at 11:41AM Winter Vivern, a low-profile threat group, has been exploiting a zero-day flaw in Roundcube Webmail servers to target governmental organizations and a think tank in Europe. The group sends a specially crafted email that loads an arbitrary JavaScript code, exploiting a newly discovered cross-site scripting flaw. Roundcube has released security … Read more
October 25, 2023 at 09:45AM The Winter Vivern threat actor has been using a zero-day vulnerability in Roundcube webmail software to access victim’s email accounts. Winter Vivern has previously targeted Ukraine, Poland, and government entities in Europe and India. The newly discovered vulnerability, CVE-2023-5631, allows for the injection of arbitrary JavaScript code. Attackers employ a … Read more