What’s Vulnerable › Vulnerabilities

CVE-2020-8117

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-04 · updated 2026-06-17
• Weakness: CWE-280

Description

Improper preservation of permissions in Nextcloud Server 14.0.3 causes the event details to be leaked when sharing a non-public event.

Affected products

• Nextcloud Server: before 12.0.13; from 13.0.0 before 13.0.8; from 14.0.0 before 14.0.4 — fixed in 12.0.13, 13.0.8, 14.0.4

How to fix

Upgrade to a fixed version: Nextcloud Server 12.0.13, 13.0.8, 14.0.4. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/439828
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-013
• https://hackerone.com/reports/439828
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-013

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