CVE-2016-9920
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.60%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a 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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.60% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- roundcube/webmail
- Source
- cve@mitre.org
EPSS 5.6% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2016/12/08/10Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/94858
- https://blog.ripstech.com/2016/roundcube-command-execution-via-email/Exploit, Third Party Advisory
- https://roundcube.net/news/2016/11/28/updates-1.2.3-and-1.1.7-releasedRelease Notes, Vendor Advisory
- https://security.gentoo.org/glsa/201612-44
- http://www.openwall.com/lists/oss-security/2016/12/08/10Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/94858
- https://blog.ripstech.com/2016/roundcube-command-execution-via-email/Exploit, Third Party Advisory
- https://roundcube.net/news/2016/11/28/updates-1.2.3-and-1.1.7-releasedRelease Notes, Vendor Advisory
- https://security.gentoo.org/glsa/201612-44
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.