# CVE-2024-42009: RoundCube Webmail Cross-Site Scripting Vulnerability

> CVE-2024-42009: RoundCube Webmail Cross-Site Scripting Vulnerability. CVSS 9.3 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2024-42009
Last updated: 2025-10-21T22:55:48Z

- Published: 2024-08-05 00:00 UTC · Updated: 2025-10-21 22:55 UTC · Assigner: mitre
- CVSS: 9.3 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- EPSS: 82.9%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-06-09, federal due date 2025-06-30, ransomware use: Unknown

## 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 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.

## Affected vendors and products

- Roundcube: Webmail

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2024-42009)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2024-42009)
- [https://github.com/roundcube/roundcubemail/releases](https://github.com/roundcube/roundcubemail/releases)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.5.8](https://github.com/roundcube/roundcubemail/releases/tag/1.5.8)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.6.8](https://github.com/roundcube/roundcubemail/releases/tag/1.6.8)
- [https://roundcube.net/news/2024/08/04/security-updates-1.6.8-and-1.5.8](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://sonarsource.com/blog/government-emails-at-risk-critical-cross-site-scripting-vulnerability-in-roundcube-webmail/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2024-42009 · Markdown: https://rewindex.com/cve/CVE-2024-42009.md · JSON: https://rewindex.com/api/v1/cves/CVE-2024-42009 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:50:55.950Z