CVE-2020-8133
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed...
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.
- Record
CVE-2020-8133- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-657, CWE-347
- Updated
- 2026-11-02
CVE List No score
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.
- Record
CVE-2020-8133- Weakness
- CWE-657
- Updated
- 2026-11-02
EUVDEUVD-2020-29034 No score
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.
- Record
EUVD-2020-29034- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-92hg-jjmr-6gv2 No score
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed...
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.
- Record
GHSA-92hg-jjmr-6gv2- Weakness
- CWE-347
- Updated
- 2026-11-02
OSV
A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.
- Record
CVE-2020-8133- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-8133 is a medium vulnerability (CVSS 5.3) in Hackerone Nextcloud Server, published November 9, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.73%, the 54th percentile. No source names a fixed version.