CVE-2020-8173
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed...
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.
- Record
CVE-2020-8173- CVSS 3.1
- 2.2 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:P/I:N/A:N - Weakness
- CWE-310, CWE-311
- Updated
- 2026-11-02
CVE List No score
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.
- Record
CVE-2020-8173- Weakness
- CWE-310
- Updated
- 2026-11-02
EUVDEUVD-2020-29057 No score
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.
- Record
EUVD-2020-29057- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v9r7-gccq-cp4v
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed...
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.
- Record
GHSA-v9r7-gccq-cp4v- CVSS 3.1
- 2.2 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-311
- Updated
- 2026-11-02
OSV
A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.
- Record
CVE-2020-8173- CVSS 3.1
- 2.2 Low
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/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-2020-8173 is a low vulnerability (CVSS 2.2) in Hackerone Nextcloud Server, published October 30, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 30th percentile. No source names a fixed version.