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CRITICAL SEVERITY
CVE-2024-42009 Roundcube · Webmail

RoundCube Webmail Cross-Site Scripting Vulnerability

Technical Severity

CVSS v3.1 Metrics

CRITICAL
9.3 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Exploitation Likelihood

EPSS Prediction

91.22 %
Predictive Probability
Percentile Rank
99.6 th

Documented as more likely to be exploited than 99.6% of known CVEs.

Detection Date

Jun 09, 2025

Remediation Due

Jun 30, 2025

CISA Catalog Active

Threat Analysis

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.

Remediation Directive

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

External Intelligence