CVE-2020-8227
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a...
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- Record
CVE-2020-8227- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.1 High
AV:N/AC:H/Au:S/C:C/I:C/A:C - Weakness
- CWE-22
- Updated
- 2026-11-02
CVE List No score
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- Record
CVE-2020-8227- Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2020-29099 No score
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- Record
EUVD-2020-29099- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-64gg-6m36-39px
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a...
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- Record
GHSA-64gg-6m36-39px- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- Record
CVE-2020-8227- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-8227
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- Record
DEBIAN-CVE-2020-8227- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-8227
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
- Record
UBUNTU-CVE-2020-8227- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nextcloud-desktopDebian:12 |
before 3.0.1-1 | 3.0.1-1 |
nextcloud-desktopDebian:13 |
before 3.0.1-1 | 3.0.1-1 |
nextcloud-desktopDebian:14 |
before 3.0.1-1 | 3.0.1-1 |
nextcloud-desktopUbuntu:20.04:LTS |
All versions, plus listed versions 2.5.3-12.6.0-12.6.1-12.6.1-22.6.2-12.6.2-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-8227 is a medium vulnerability (CVSS 6.8) in Nextcloud Desktop, published August 21, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 25.8%, the 97th percentile. Fixed in nextcloud-desktop 3.0.1-1.
References
hackerone.com/reports/590319
nextcloud.com/security/advisory?id=NC-SA-2020-032
security.gentoo.org/glsa/202009-09
nvd.nist.gov/vuln/detail/CVE-2020-8227
github.com/advisories/GHSA-64gg-6m36-39px
security-tracker.debian.org/tracker/CVE-2020-8227
ubuntu.com/security/CVE-2020-8227
cve.org/CVERecord?id=CVE-2020-8227