Threat actors operating with interests aligned to Belarus and Russia have been linked to a new cyber espionage campaign that likely exploited cross-site scripting (XSS) vulnerabilities in Roundcube webmail servers to target over 80 organizations. These entities are primarily located in Georgia, Poland, and Ukraine, according to Recorded Future, which attributed the intrusion set to a threat actor known as Winter Vivern, which is also known as TA473 and UAC0114. The cybersecurity firm is tracking the hacking outfit under the moniker Threat Activity Group 70 (TAG-70). Winter Vivern's exploitation of security flaws in Roundcube and software was previously highlighted by ESET in October 2023, joining other Russia-linked threat actor groups such as APT28, APT29, and Sandworm that are known to target email software. The adversary, which has been active since at least December 2020, has also been linked to the abuse of a now-patched vulnerability in Zimbr...
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