What’s Vulnerable › Vulnerabilities

CVE-2020-8150

• Severity: medium (CVSS 4.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-09 · updated 2026-06-17
• Weakness: CWE-310

Description

A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.

Affected products

• Nextcloud Server: before 19.0.2 — fixed in 19.0.2

How to fix

Upgrade to a fixed version: Nextcloud Server 19.0.2. Check the vendor advisory for mitigations.

References

• http://seclists.org/fulldisclosure/2020/Dec/55
• http://seclists.org/fulldisclosure/2020/Dec/57
• http://seclists.org/fulldisclosure/2020/Dec/58
• https://hackerone.com/reports/742588
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-039
• http://seclists.org/fulldisclosure/2020/Dec/55
• http://seclists.org/fulldisclosure/2020/Dec/57
• http://seclists.org/fulldisclosure/2020/Dec/58
• https://hackerone.com/reports/742588
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-039

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