Known exploited vulnerability
CVE-2024-42009
The short answer
CVE-2024-42009 affects n/a n/a and is rated critical (CVSS 9.3). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-06-09: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-79.
Severity
9.3 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Exploited (CISA KEV)
Yes, since Jun 9, 2025
Federal due date Jun 30, 2025
EPSS, next 30 days
83%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
What CISA says to do
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 products
n/a. NVD's record lists the exact affected versions.
References
- github.com/roundcube/roundcubemail/releases Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.5.8 Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.6.8 Release Notes
- roundcube.net/news/2024/08/04/security-updates-1.6.8-and-1.5.8 Vendor Advisory
- sonarsource.com/blog/government-emails-at-risk-critical-cross-site-scripting-vulnerability-in-roundcube-webmail/ Technical DescriptionThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-42009 US Government Resource
Questions
Is CVE-2024-42009 being exploited?
Yes. CISA added CVE-2024-42009 to its Known Exploited Vulnerabilities catalog on 2025-06-09, with a federal remediation due date of 2025-06-30.
How do I fix CVE-2024-42009?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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