CVE-2024-42009
RoundCube Webmail Cross-Site Scripting Vulnerability
Published Aug 5, 2024 · corrected/updated Jun 17, 2026 · CERT-FR webmail · evidence confidence very high
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.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2024-42009 is a critical public vulnerability record for CERT-FR webmail. CISA lists it as known exploited. Published remediation 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. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether CERT-FR webmail is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: roundcube/webmail; Roundcube Webmail. Published remediation 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. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 9.3, EPSS 82.9%. CISA lists it as known exploited. Weakness classes: CWE-79. Sources contributing to this record: certfr, cisa_kev, cve_org, epss. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Confirmed in CISA KEV since Jun 9, 2025. Listed in the CISA Known Exploited Vulnerabilities catalog.
Patch and remediation
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA due date Jun 30, 2025.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Aug 5, 2024 · Catalog
Detected
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.
Jun 9, 2025 · CISA KEV
Known exploited
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Jun 30, 2025 · CISA KEV
Remediation due
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Jun 17, 2026 · Catalog
Updated
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.
Affected
- cpe roundcube/webmailversion unspecified
- vendor Roundcube Webmailversion unspecified
Sources
- CERT-FRGovernment advisoryCVE-2024-42009
Le 4 août 2024, Roundcube a publié des correctifs concernant les vulnérabilités critiques CVE-2024-42008 et CVE-2024-42009 affectant son serveur de courriel. Ces vulnérabilités permettent des injections de code indirectes à distance (XSS) qui peuvent, par exemple, conduire à la r
cert.ssi.gouv.fr - CISA KEVConfirmed exploitationCVE-2024-42009
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.
cisa.gov - CVE.orgVulnerability recordCVE-2024-42009
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2024-42009
30-day exploitation probability 82.9%
first.org - NIST NVDVulnerability recordCVE-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.
nvd.nist.gov