RoundCube Webmail Cross-Site Scripting Vulnerability
n/a — n/a
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.
9.3
84.4%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- Published
- Aug 5, 2024
- Modified
- Oct 21, 2025
- Added to KEV
- Jun 9, 2025
- Federal patch due
- Jun 30, 2025
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.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2024-42009, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2024-42009 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2024-42009?
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.
How severe is CVE-2024-42009?
CVE-2024-42009 has a CVSS base score of 9.3 out of 10 (CVSS 3.1).
Is CVE-2024-42009 actively exploited in the wild?
Yes. CVE-2024-42009 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jun 9, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2024-42009?
84.4% - meaning FIRST.org's EPSS model estimates a 84.4% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2024-42009?
Yes - a public Nuclei template referencing CVE-2024-42009 exist in public repositories we checked.
What type of vulnerability is CVE-2024-42009?
CVE-2024-42009 is classified under CWE-79 (CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')).
Cross-checked against
Impactr finds and proves whether CVE-2024-42009 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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