CVE-2025-49113

RoundCube Webmail Deserialization of Untrusted Data Vulnerability

Critical 9.9
Exploited: added to CISA KEV 20 Feb 2026

Description

Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization.

Key facts

Published: 2 Jun 2025
Last changed: 21 Feb 2026
Assigned by: mitre
KEV added: 20 Feb 2026
KEV fix due: 13 Mar 2026
EPSS: 99.604% likely to be exploited in the next 30 days, higher than 99.948% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

9.9CVSS 3.1, Criticalfrom the CNA (mitre)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

What to do

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 KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
Roundcube	Webmail	Default status: unaffected 0 up to but excluding 1.5.10 (affected) 1.6.0 up to but excluding 1.6.11 (affected)