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cve recordhighexploited in the wild3 of 3 cataloguesexploit reported

CVE-2024-42009

Roundcube · Webmail · RoundCube Webmail Cross-Site Scripting Vulnerability

· Added to CISA KEV
CVSS—
Severityhigh
Weakness—
EPSS82.9%99.7th percentile
Exploited3 KEV sources
Ransomware useUnknown
Federal fix dueJun 30, 2025
patch window

Called exploited 304 days after disclosure.

Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.

The life of this vulnerability

  1. CVE published
  2. First KEV listing10mo
  3. Last KEV listing4d
  4. Last sighting1.2y

Gaps are compressed to equal steps. The elapsed time is printed under each.

Which catalogues call it exploited

Sources3 of 3
Listings differ by4 d
Strongest claimconfirmed

3 catalogues list it. CIRCL aggregates the others and is shown but not counted.

Public exploitation evidence

14 public reports collected from VulnCheck and CIRCL, first on Jun 5, 2025. Each links to its original source. We have not verified them.

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

Cybersecurity researchers identified 85 high-impact vulnerabilities in July 2026 that require urgent remediation, marking a 44% increase from the previous month. Of these, 36 were assigned a "Very Critical" risk score by Insikt Group. The vulnerabilities affected products from 61 vendors, with Microsoft accounting for approximately 12% of the total.

CVE-2024-42009high

Suspected China-Aligned Hackers Exploit Roundcube Flaws Against Universities

A new cyberattack campaign has been detected, specifically targeting academic institutions in North America. The perpetrators of this campaign are suspected to be aligned with China and are leveraging security weaknesses in the Roundcube webmail system. The attacks appear to be concentrated on physics and engineering departments within these universities.

CVE-2024-42009high

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

China-aligned attackers have targeted U.S. and Canadian universities, exploiting a chain of vulnerabilities in the Roundcube webmail client to gain unauthorized access to sensitive data and establish persistent footholds within academic networks. The campaign, observed by Proofpoint researchers since May, appears to be ongoing and has primarily focused on physics and engineering departments,…