High severity7.5NVD Advisory· Published Dec 8, 2016· Updated May 6, 2026

CVE-2016-9920

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.

Affected products

Roundcube/Webmail4 versions
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*range: <=1.1.6
- cpe:2.3:a:roundcube:webmail:1.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:roundcube:webmail:1.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:roundcube:webmail:1.2.2:*:*:*:*:*:*:*

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

blog.ripstech.com/2016/roundcube-command-execution-via-email/nvdExploitThird Party Advisory
www.openwall.com/lists/oss-security/2016/12/08/10nvdMailing ListThird Party Advisory
roundcube.net/news/2016/11/28/updates-1.2.3-and-1.1.7-releasednvdRelease NotesVendor Advisory
www.securityfocus.com/bid/94858nvd
security.gentoo.org/glsa/201612-44nvd

News mentions

No linked articles in our index yet.

cvss	0.488
epss	0.031
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000