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cve recordhighexploited in the wild

CVE-2024-42009

Roundcube · Webmail · RoundCube Webmail Cross-Site Scripting Vulnerability

· Added to CISA KEV
CVSS—
Severityhigh
Weakness—
ExploitedYes, in CISA KEV
Ransomware useUnknown
Federal fix dueJun 30, 2025

Description

RoundCube Webmail contains a cross-site scripting vulnerability. This vulnerability could allow a remote attacker to steal and send emails of a victim via a crafted e-mail message that abuses a Desanitization issue in message_body() in program/actions/mail/show.php.

Required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

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Our coverage of CVE-2024-42009

CVE-2008-4128high

July 2026 CVE Landscape

In July 2026, a significant increase in high-impact vulnerabilities was observed, with 85 critical flaws identified, 36 of which had a Very Critical Recorded Future Risk Score. A notable portion of these vulnerabilities were either already listed in CISA's Known Exploited Vulnerabilities catalog or were reported by vendors. The vulnerabilities affected a wide range of products from 61 vendors, with Microsoft products being the most frequently impacted.

CVE-2024-42009high

Suspected China-Aligned Hackers Exploit Roundcube Flaws Against Universities

Researchers have identified a new cyberattack campaign targeting academic institutions in North America. The attackers, believed to be linked to China, are exploiting vulnerabilities within the Roundcube webmail system used by physics and engineering departments.

CVE-2024-42009high

Suspected Chinese espionage group used a Roundcube exploit chain to burrow into universities

A China-aligned espionage group has been observed targeting U.S. and Canadian universities, specifically in physics and engineering departments. The attackers exploited two vulnerabilities in the Roundcube email client (CVE-2024-42009 and CVE-2025-49113) to steal credentials and establish persistent access through webshells and backdoors. Proofpoint researchers identified the campaign, which appears to be ongoing, and noted that victims may not yet be aware of the compromise.