RoundCube Webmail Deserialization of Untrusted Data Vulnerability
Roundcube — Webmail
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.
9.9
99.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Published
- Jun 2, 2025
- Modified
- Feb 21, 2026
- Added to KEV
- Feb 20, 2026
- Federal patch due
- Mar 13, 2026
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2025-49113, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2025-49113 were found at last check. Absence here is not proof no exploit exists — see the references below for vendor advisories and write-ups.
References
How this class of flaw gets exploited
Frequently asked questions
What is CVE-2025-49113?
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.
How severe is CVE-2025-49113?
CVE-2025-49113 has a CVSS base score of 9.9 out of 10 (CVSS 3.1).
Is CVE-2025-49113 actively exploited in the wild?
Yes. CVE-2025-49113 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Feb 20, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-49113?
99.0% - meaning FIRST.org's EPSS model estimates a 99.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-49113?
Yes - a public Nuclei template referencing CVE-2025-49113 exist in public repositories we checked.
What type of vulnerability is CVE-2025-49113?
CVE-2025-49113 is classified under CWE-502 (CWE-502 Deserialization of Untrusted Data).
Cross-checked against
Impactr finds and proves whether CVE-2025-49113 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.