Actively exploited · Published Aug 5, 2024 · Assigned by mitre
CVE-2024-42009
Critical 9.3 Exploited
In plain English
A critical-severity cross-site scripting in Webmail from Roundcube. Attackers are actively exploiting it in the wild (listed by CISA on June 9, 2025). The chance it is exploited in the next 30 days is estimated at 82.9% (higher than 99.7% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Jun 30, 2025.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u3 | DEBIAN-CVE-2024-42009 |
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u3 | DSA-5743-1 |
| Debian:13 | roundcube | 1.6.8+dfsg-1 | DEBIAN-CVE-2024-42009 |
| Debian:14 | roundcube | 1.6.8+dfsg-1 | DEBIAN-CVE-2024-42009 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
References
- https://github.com/roundcube/roundcubemail/releases
- https://sonarsource.com/blog/government-emails-at-risk-critical-cross-site-scripting-vulnerability-in-roundcube-webmail/
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.8
- 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://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-42009 government-resource