CVE-2024-42009
RoundCube Webmail Cross-Site Scripting Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 30 June 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.3 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- EPSS
- 82.88% probability · 100th percentile
- CISA KEV
- Listed 9 June 2025 · due 30 June 2025
- Weakness
- CWE-79
- Affected
- roundcube/webmail
- Source
- cve@mitre.org
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://roundcube.net/news/2024/08/04/security-updates-1.6.8-and-1.5.8 ; https://nvd.nist.gov/vuln/detail/CVE-2024-42009
References
- https://github.com/roundcube/roundcubemail/releasesRelease Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.8Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.8Release Notes
- https://roundcube.net/news/2024/08/04/security-updates-1.6.8-and-1.5.8Vendor Advisory
- https://sonarsource.com/blog/government-emails-at-risk-critical-cross-site-scripting-vulnerability-in-roundcube-webmail/Technical Description, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-42009US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.