All vulnerabilities
CVE-2025-49113

RoundCube Webmail Deserialization of Untrusted Data Vulnerability

Roundcube WebmailApplications & CMS
Open in ThreatlineRecord JSON
CVSS
9.9Critical
ExploitationExploited in the wildAdded to KEV 20 Feb 2026CISA KEV
Exploit odds (EPSS)99.0%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.5.10Also 1.6.11CVE List
Federal deadline13 Mar 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 2 Jun 2025, 00:00 UTCPublishedCVE List
  2. 2 Jun 2025Exploit code publicMetasploit
  3. 20 Feb 2026Added to CISA KEVCISA KEV

Public exploit code and templates 3

  • Exploit moduleRoundcube Post-Auth RCE via PHP Object Deserialization 2 Jun 2025Metasploit
  • Webapps exploitRoundcube 1.6.10 - Remote Code Execution (RCE) 13 Jun 2025Exploit-DB
  • Scanner templateRoundcube Webmail - Remote Code ExecutionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

RoundCube Webmail contains a deserialization of untrusted data vulnerability that allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php.

Text from CVE List

Affected versions 2

  • Webmailaffected: all versions before 1.5.10CVE List
  • Webmailaffected: 1.6.0 before 1.6.11CVE List

References 13