CVE-2025-49113
Published 2025-06-02 · Updated 2026-06-17 · Source cve@mitre.org
Summary
CVE-2025-49113 is a critical-severity (CVSS 9.9) vulnerability in Roundcube Webmail. CISA added it to the Known Exploited Vulnerabilities catalog on February 20, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 13, 2026. CISA does not currently list it as used in ransomware campaigns. Roundcube has 11 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 11 known-exploited Roundcube vulnerabilities →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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Roundcube — Webmail
Name: RoundCube Webmail Deserialization of Untrusted Data Vulnerability
Date added: 2026-02-20 · Due: 2026-03-13
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.
References
- https://fearsoff.org/research/roundcube
- https://github.com/roundcube/roundcubemail/commit/0376f69e958a8fef7f6f09e352c541b4e7729c4d
- https://github.com/roundcube/roundcubemail/commit/7408f31379666124a39f9cb1018f62bc5e2dc695
- https://github.com/roundcube/roundcubemail/commit/c50a07d88ca38f018a0f4a0b008e9a1deb32637e
- https://github.com/roundcube/roundcubemail/pull/9865
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.10
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.11
- https://roundcube.net/news/2025/06/01/security-updates-1.6.11-and-1.5.10