A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.
Priority LOW 33CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.
Summary
A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.
Why it matters now
EPSS 0.00956 61st percentileScored 2026-11-07
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 |
|---|---|---|---|---|---|
| — | Nextcloud Mail | 1.1.4 | — | No fix listed | CNA |
- Nextcloud Mail Vendor— Affected 1.1.4 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:* | before 1.1.4 | Vulnerable | nextcloud |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
- cpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:* Versions before 1.1.4 Vulnerable ·nextcloud
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2020-8156
- 2026-10-03 Alias added: GHSA-fgvj-4m6x-j67f
References
Sources
- CVE-2020-8156 · CVE Program
- CVE-2020-8156 · NVD
- FIRST EPSS
- GHSA-fgvj-4m6x-j67f · GitHub Advisory Database · CC BY 4.0
- CVE-2020-8156 · 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