CVE-2017-16651

Name: CVE-2017-16651
Creator: NVD / NIST
Published: 2017-11-09T14:29:00.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 42.83%

Last modified Jun 17, 2026

CVE-2017-16651 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 42.83% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

42.83%

98.5th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Roundcube	Webmail	<= 1.1.9
Roundcube	Webmail	1.2.0
Roundcube	Webmail	1.2.1
Roundcube	Webmail	1.2.2
Roundcube	Webmail	1.2.3
Roundcube	Webmail	1.2.4
Roundcube	Webmail	1.2.5
Roundcube	Webmail	1.2.6
Roundcube	Webmail	1.3.0
Roundcube	Webmail	1.3.1
Roundcube	Webmail	1.3.2
Debian	Debian Linux	7.0
Debian	Debian Linux	9.0

References

http://packetstormsecurity.com/files/161226/Roundcube-Webmail-1.2-File-Disclosure.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/101793Third Party Advisory, VDB Entry
https://github.com/roundcube/roundcubemail/issues/6026Issue Tracking, Patch, Third Party Advisory
https://github.com/roundcube/roundcubemail/releases/tag/1.1.10Issue Tracking, Release Notes, Third Party Advisory
https://github.com/roundcube/roundcubemail/releases/tag/1.2.7Issue Tracking, Release Notes, Third Party Advisory
https://github.com/roundcube/roundcubemail/releases/tag/1.3.3Issue Tracking, Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00039.htmlMailing List, Third Party Advisory
https://roundcube.net/news/2017/11/08/security-updates-1.3.3-1.2.7-and-1.1.10Issue Tracking, Vendor Advisory
https://www.debian.org/security/2017/dsa-4030Issue Tracking, Third Party Advisory
http://packetstormsecurity.com/files/161226/Roundcube-Webmail-1.2-File-Disclosure.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/101793Third Party Advisory, VDB Entry
https://github.com/roundcube/roundcubemail/issues/6026Issue Tracking, Patch, Third Party Advisory
https://github.com/roundcube/roundcubemail/releases/tag/1.1.10Issue Tracking, Release Notes, Third Party Advisory
https://github.com/roundcube/roundcubemail/releases/tag/1.2.7Issue Tracking, Release Notes, Third Party Advisory
https://github.com/roundcube/roundcubemail/releases/tag/1.3.3Issue Tracking, Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00039.htmlMailing List, Third Party Advisory
https://roundcube.net/news/2017/11/08/security-updates-1.3.3-1.2.7-and-1.1.10Issue Tracking, Vendor Advisory
https://www.debian.org/security/2017/dsa-4030Issue Tracking, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-16651US Government Resource

Timeline

Published: Nov 9, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-16651?

How severe is CVE-2017-16651?

CVE-2017-16651 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 42.83% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-16651?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-16651?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST