What’s Vulnerable › Vulnerabilities

CVE-2020-8156

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-12 · updated 2026-06-17
• Weakness: CWE-295

Description

A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.

Affected products

• Fedoraproject Fedora: 32
• nextcloud Mail: before 1.1.4 — fixed in 1.1.4

How to fix

Upgrade to a fixed version: nextcloud Mail 1.1.4. Check the vendor advisory for mitigations.

References

• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-020
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-020

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