steps/mail/sendmail.inc in Roundcube before 1.1.7 and 1.2.x before 1.2.3, when no SMTP…
Priority MEDIUM 41CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-284.
Summary
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.
Why it matters now
EPSS 0.05646 93rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* | up to 1.1.6 | Vulnerable | Roundcube |
| cpe:2.3:a:roundcube:webmail:1.2.0:*:*:*:*:*:*:* | 1.2.0 | Vulnerable | Roundcube |
| cpe:2.3:a:roundcube:webmail:1.2.1:*:*:*:*:*:*:* | 1.2.1 | Vulnerable | Roundcube |
| cpe:2.3:a:roundcube:webmail:1.2.2:*:*:*:*:*:*:* | 1.2.2 | Vulnerable | Roundcube |
- cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* Versions up to 1.1.6 Vulnerable ·Roundcube
- cpe:2.3:a:roundcube:webmail:1.2.0:*:*:*:*:*:*:* Versions 1.2.0 Vulnerable ·Roundcube
- cpe:2.3:a:roundcube:webmail:1.2.1:*:*:*:*:*:*:* Versions 1.2.1 Vulnerable ·Roundcube
- cpe:2.3:a:roundcube:webmail:1.2.2:*:*:*:*:*:*:* Versions 1.2.2 Vulnerable ·Roundcube
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2016-9920
- 2026-10-03 Alias added: GHSA-f59r-7mfp-ww98
References
More Roundcube Webmail vulnerabilities
- TI-2025-31204 Deserialization of untrusted data in Roundcube Webmail KEVCVSS 3.1CRITICAL 9.9
- TI-2021-19778 Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential SQL injection via search or search_params. KEVCVSS 3.1CRITICAL 9.8
- TI-2020-10051 rcube_image.php in Roundcube Webmail before 1.4.4 allows attackers to execute arbitrary… KEVCVSS 3.1CRITICAL 9.8
- TI-2024-28025 A Cross-Site Scripting vulnerability in Roundcube through 1.5.7 and 1.6.x through 1.6.7… KEVCVSS 3.1CRITICAL 9.3
- TI-2017-12250 Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows… KEVCVSS 3.1HIGH 7.8
- TI-2025-41994 Cross-site scripting in Roundcube Webmail KEVCVSS 3.1HIGH 7.2
Sources
- CVE-2016-9920 · CVE Program
- CVE-2016-9920 · NVD
- FIRST EPSS
- GHSA-f59r-7mfp-ww98 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-9920 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences