CVE-2020-8150
A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.
- Published
- Nov 9, 2020
- Updated
- Aug 4, 2024
- Assigning CNA
- hackerone
- Evidence observed
- Aug 25, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:NLow · next 30 days
- Percentile
- 21.7%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.
Sources
1Proof-of-concept exploit for CVE-2020-8289 demonstrating remote code execution as SYSTEM/root via Backblaze backup client's SSL verification bypass and unvalidated update mechanism.
Responsible use
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