CVE-2016-9920

Public Exploit

Description

steps/mail/sendmail.inc in Roundcube before 1.1.7 and 1.2.x before 1.2.3, when no SMTP server is configured and the sendmail program is enabled, does not properly restrict the use of custom envelope-from addresses on the sendmail command line, which allows remote authenticated users to execute arbitrary code via a modified HTTP request that sends a crafted e-mail message.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 38.30% Top 5%
Vendor Advisory gentoo.org Vendor Advisory roundcube.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://blog.ripstech.com/2016/roundcube-command-execution-via-email/ third party advisory exploit
http://www.securityfocus.com/bid/94858 vdb entry
http://www.openwall.com/lists/oss-security/2016/12/08/10 third party advisory mailing list
https://roundcube.net/news/2016/11/28/updates-1.2.3-and-1.1.7-released release notes vendor advisory
https://security.gentoo.org/glsa/201612-44 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-9920?
CVE-2016-9920 has been scored as a high severity vulnerability.
How to fix CVE-2016-9920?
To fix CVE-2016-9920, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-9920 being actively exploited in the wild?
It is possible that CVE-2016-9920 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~38% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.