cyfenced.com →

[ CVE-2024-42009 · Published 5 Aug 2024 ]

RoundCube Webmail Cross-Site Scripting Vulnerability

Exploited · CISA KEV CVSS 9.3 EPSS 83%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-06-09
  • EPSS: 83% chance of exploitation in the next 30 days (higher than 100% of CVEs)
  • Critical severity: CVSS 9.3

[ Description ]Official description

A Cross-Site Scripting vulnerability in Roundcube through 1.5.7 and 1.6.x through 1.6.7 allows 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.

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 30 Jun 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References