CVE-2024-42009
KEVRoundCube Webmail Cross-Site Scripting Vulnerability
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.
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:NPublishedAug 5, 2024
Last modifiedJun 17, 2026
Added to KEVJun 9, 2025
Remediation dueJun 30, 2025
References
- github.com/roundcube/roundcubemail/releasesRelease Notes
- github.com/roundcube/roundcubemail/releases/tag/1.5.8Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.6.8Release Notes
- roundcube.net/news/2024/08/04/security-updates-1.6.8-and-1.5.8Vendor Advisory
- sonarsource.com/blog/government-emails-at-risk-critical-cross-site-scripting-vulnerability-in-roundcube-webmail/Technical DescriptionThird Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-42009US Government Resource
0 recent articles mention this CVE
85
Risk assessment · Critical
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 483 days
- CVSS
- 9.3 CRITICAL
- EPSS (30-day exploit probability)
- 82.9% · top 1% of all CVEs
- Weakness
- CWE-79
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.