What’s Vulnerable › Vulnerabilities

CVE-2020-8118

• Severity: medium (CVSS 5.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-02-04 · updated 2026-06-17
• Weakness: CWE-918

Description

An authenticated server-side request forgery in Nextcloud server 16.0.1 allowed to detect local and remote services when adding a new subscription in the calendar application.

Affected products

• Nextcloud Server: before 15.0.9; from 16.0.0 before 16.0.2 — fixed in 15.0.9, 16.0.2
• Novell Suse Linux Enterprise Server: 12.0
• openSUSE Backports Sle: 15.0-sp1

How to fix

Upgrade to a fixed version: Nextcloud Server 15.0.9, 16.0.2. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html
• http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html
• https://hackerone.com/reports/427835
• https://nextcloud.com/security/advisory/?id=NC-SA-2019-014
• http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html
• http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html
• https://hackerone.com/reports/427835
• https://nextcloud.com/security/advisory/?id=NC-SA-2019-014

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