Roundcube | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have disclosed details of a critical security flaw in the Roundcube webmail software that has gone unnoticed for a decade and could be exploited to take over susceptible systems and execute arbitrary code. The vulnerability, tracked as CVE-2025-49113 , carries a CVSS score of 9.9 out of 10.0. It has been described as a case of post-authenticated remote code execution via PHP object deserialization. "Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization," reads the description of the flaw in the NIST's National Vulnerability Database (NVD). The shortcoming, which affects all versions of the software before and including 1.6.10, has been addressed in 1.6.11 and 1.5.10 LTS . Kirill Firsov, founder and CEO of FearsOff, has been credited with discovering and repor...

A Russia-linked threat actor has been attributed to a cyber espionage operation targeting webmail servers such as Roundcube, Horde, MDaemon, and Zimbra via cross-site scripting (XSS) vulnerabilities, including a then-zero-day in MDaemon, according to new findings from ESET. The activity, which commenced in 2023, has been codenamed Operation RoundPress by the Slovak cybersecurity company. It has been attributed with medium confidence to the Russian state-sponsored hacking group tracked as APT28, which is also referred to as BlueDelta, Fancy Bear, Fighting Ursa, Forest Blizzard, FROZENLAKE, Iron Twilight, ITG05, Pawn Storm, Sednit, Sofacy, and TA422. "The ultimate goal of this operation is to steal confidential data from specific email accounts," ESET researcher Matthieu Faou said in a report shared with The Hacker News. "Most victims are governmental entities and defense companies in Eastern Europe, although we have observed governments in Africa, Europe, and South ...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday  added  a medium-severity security flaw impacting Roundcube email software to its Known Exploited Vulnerabilities ( KEV ) catalog, based on evidence of active exploitation. The issue, tracked as  CVE-2023-43770  (CVSS score: 6.1), relates to a cross-site scripting (XSS) flaw that stems from the handling of linkrefs in plain text messages. "Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that can lead to information disclosure via malicious link references in plain/text messages," CISA said. According to a description of the bug on NIST's National Vulnerability Database (NVD), the vulnerability impacts Roundcube versions before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3. The flaw was  addressed  by Roundcube maintainers with  version 1.6.3 , which was released on September 15, 2023. Zscaler security researcher Niraj Shivtarkar has be...

The threat actor known as  Winter Vivern  has been observed exploiting a zero-day flaw in Roundcube webmail software on October 11, 2023, to harvest email messages from victims' accounts. "Winter Vivern has stepped up its operations by using a zero-day vulnerability in Roundcube," ESET security researcher Matthieu Faou  said  in a new report published today. Previously, it was using known vulnerabilities in Roundcube and Zimbra, for which proofs-of-concept are available online." Winter Vivern, also known as TA473 and UAC-0114, is an  adversarial collective  whose objectives align with that of Belarus and Russia. Over the past few months, it has been attributed to attacks against Ukraine and Poland, as well as government entities across Europe and India. The group is also assessed to have exploited another flaw Roundcube as recently as August and September (CVE-2020-35730), making it the  second nation-state group after APT28  to target the op...