Russian-Linked Hackers Target 80+ Organizations via Roundcube Flaws

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

Zero-Day Flaw in Zimbra Email Software Exploited by Four Hacker Groups

A zero-day flaw in the Zimbra Collaboration email software was exploited by four different groups in real-world attacks to pilfer email data, user credentials, and authentication tokens. "Most of this activity occurred after the initial fix became public on GitHub," Google Threat Analysis Group (TAG) said in a report shared with The Hacker News. The flaw, tracked as CVE-2023-37580 (CVSS score:

New Wave of Attack Campaign Targeting Zimbra Email Users for Credential Theft

A new "mass-spreading" social engineering campaign is targeting users of the Zimbra Collaboration email server with an aim to collect their login credentials for use in follow-on operations. The activity, active since April 2023 and still ongoing, targets a wide range of small and medium businesses and governmental entities, most of which are located in Poland, Ecuador, Mexico, Italy, and Russia

S3 Ep144: When threat hunting goes down a rabbit hole

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Zimbra Collaboration Suite warning: Patch this 0-day right now (by hand)!

Zimbra didn't actually say, "Do not delay/Do it today," but they did say, "We kindly request your cooperation to apply the fix manually."

Zimbra Warns of Critical Zero-Day Flaw in Email Software Amid Active Exploitation

Zimbra has warned of a critical zero-day security flaw in its email software that has come under active exploitation in the wild. "A security vulnerability in Zimbra Collaboration Suite Version 8.8.15 that could potentially impact the confidentiality and integrity of your data has surfaced," the company said in an advisory. It also said that the issue has been addressed and that it's expected to

Winter Vivern APT Targets European Government Entities with Zimbra Vulnerability

The advanced persistent threat (APT) actor known as Winter Vivern is now targeting officials in Europe and the U.S. as part of an ongoing cyber espionage campaign. "TA473 since at least February 2023 has continuously leveraged an unpatched Zimbra vulnerability in publicly facing webmail portals that allows them to gain access to the email mailboxes of government entities in Europe," Proofpoint