What is CVE-2024-42009?
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.
Timeline
- 2024-08-05Published to the U.S. National Vulnerability Database (NVD)
- 2025-06-09Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2025-06-30CISA federal remediation deadline (BOD 22-01)
- 2026-06-17NVD record last updated
CISA Known Exploited Vulnerability
RoundCube Webmail Cross-Site Scripting Vulnerability
Affected product
Roundcube Webmail
Remediation Steps
- Identify all Roundcube instances in your environment
- Apply the latest Roundcube security patch
- Review access logs for indicators of exploitation
- Reset credentials for accounts accessed through vulnerable Roundcube instances
- Monitor for lateral movement following potential compromise
References
- https://roundcube.net/news/2024/08/04/security-updates-1.6.8-and-1.5.8
- https://sonarsource.com/blog/government-emails-at-risk-critical-cross-site-scripting-vulnerability-in-roundcube-webmail/
- https://github.com/roundcube/roundcubemail/releases
- https://nvd.nist.gov/vuln/detail/CVE-2024-42009
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 1 of July 2026 (July 6 – 12)
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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.