CVE-2017-16651

CVE-2017-16651 is a high-severity (CVSS 7.8) vulnerability in Roundcube Roundcube Webmail. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. 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.

Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including configuration files, as exploited in the wild in November 2017. The attacker must be able to authenticate at the target system with a valid username/password as the attack requires an active session. The issue is related to file-based attachment plugins and _task=settings&_action=upload-display&_from=timezone requests.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

• http://packetstormsecurity.com/files/161226/Roundcube-Webmail-1.2-File-Disclosure.html
• http://www.securityfocus.com/bid/101793
• https://github.com/roundcube/roundcubemail/issues/6026
• https://github.com/roundcube/roundcubemail/releases/tag/1.1.10
• https://github.com/roundcube/roundcubemail/releases/tag/1.2.7
• https://github.com/roundcube/roundcubemail/releases/tag/1.3.3
• https://lists.debian.org/debian-lts-announce/2017/11/msg00039.html
• https://roundcube.net/news/2017/11/08/security-updates-1.3.3-1.2.7-and-1.1.10