Security readout for executives and security teams
Roundcube Webmail has a critical flaw that lets a logged-in user execute code on the server. For organizations exposing Roundcube to staff or customers, compromise could affect email confidentiality, integrity, and service availability. Fixed Roundcube releases are available. Exposure is most likely where Roundcube Webmail is deployed and reachable by users, especially internet-facing instances running before 1.5.10 or 1.6.11. Exploitation requires authentication, but the CVSS vector indicates network access, low complexity, no user interaction, and high impact. Prioritize same-day remediation for exposed Roundcube systems. This is critical, known-exploited, and affects email infrastructure, which often contains sensitive business data and credentials. Authentication is required, but stolen or low-privilege accounts may still create serious risk. Mitigation focus: Upgrade Roundcube 1.6.x deployments to 1.6.11 or later.; Upgrade Roundcube 1.5.x deployments to 1.5.10 or later.; Apply relevant distribution security updates where Roundcube is packaged by the OS vendor..
Michael Williams reviewed this cited source version on .
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ATT&CK lookup starting points
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CWE-502: Code execution behavior lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-49113 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H3.16Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://roundcube.net/news/2025/06/01/security-updates-1.6.11-and-1.5.10CVE reference
- https://github.com/roundcube/roundcubemail/pull/9865CVE reference
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.11CVE reference
- https://github.com/roundcube/roundcubemail/commit/0376f69e958a8fef7f6f09e352c541b4e7729c4dCVE reference
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.10CVE reference
- https://github.com/roundcube/roundcubemail/commit/7408f31379666124a39f9cb1018f62bc5e2dc695CVE reference
- https://github.com/roundcube/roundcubemail/commit/c50a07d88ca38f018a0f4a0b008e9a1deb32637eCVE reference
- https://fearsoff.org/research/roundcubeCVE reference
- https://www.vicarius.io/vsociety/posts/cve-2025-49113-roundcube-vulnerability-detectionCVE reference
- https://www.vicarius.io/vsociety/posts/cve-2025-49113-roundcube-mitigation-scriptCVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-49113CVE reference · government-resource
- https://lists.debian.org/debian-lts-announce/2025/06/msg00008.htmlCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.