What’s Vulnerable › Vulnerabilities

CVE-2020-8121

• Severity: high (CVSS 8.1 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: yes
• Published: 2020-02-04 · updated 2026-06-17
• Weakness: CWE-284

Description

A bug in Nextcloud Server 14.0.4 could expose more data in reshared link shares than intended by the sharer.

Affected products

• Nextcloud Server: before 13.0.9; from 14.0.0 before 14.0.5; from 14.0.6 before 15.0.0 — fixed in 13.0.9, 14.0.5, 15.0.0

How to fix

Upgrade to a fixed version: Nextcloud Server 13.0.9, 14.0.5, 15.0.0. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/452854
• https://nextcloud.com/security/advisory/?id=NC-SA-2019-003
• https://hackerone.com/reports/452854
• https://nextcloud.com/security/advisory/?id=NC-SA-2019-003

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