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Vulnerabilities

Vulnerability · CVE-2024-42009

RoundCube Webmail Cross-Site Scripting Vulnerability

Published Aug 5, 2024 · catalog updated Jun 17, 2026 · Roundcube Roundcube Webmail

Patch now

CVE-2024-42009 is in the CISA known-exploited catalog, due Jun 30, 2025. Confirm Roundcube Roundcube Webmail against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.3
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
82.88%
Remediation
Remediation guidance
Affected products
cpe roundcube/webmail · vendor Roundcube Roundcube Webmail · vendor Roundcube Webmail

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe roundcube/webmailversion unspecified
  • vendor Roundcube Roundcube Webmailversion unspecified
  • vendor Roundcube Webmailversion unspecified

How to fix CVE-2024-42009

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2024-42009 is in the CISA known-exploited catalog, due Jun 30, 2025. Confirm Roundcube Roundcube Webmail against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 82.88%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. 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.

  2. 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.

  3. 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.

  4. 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.

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
  • VulnCheck 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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.