CVE-2024-42009

RoundCube Webmail Cross-Site Scripting Vulnerability

Roundcube — Webmail

Added to KEV catalog: 9 June 2025
Federal remediation due date: 30 June 2025
Weakness classification (CWE): CWE-79

CISA 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

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

Notes

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

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