Vulnerability Details : 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.
Vulnerability category: Directory traversal
Products affected by CVE-2020-8227
- cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8227
1.28%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 86 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8227
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.1
|
HIGH | AV:N/AC:H/Au:S/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
6.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H |
0.9
|
5.9
|
NIST |
CWE ids for CVE-2020-8227
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by:
- nvd@nist.gov (Primary)
- support@hackerone.com (Secondary)
References for CVE-2020-8227
-
https://nextcloud.com/security/advisory/?id=NC-SA-2020-032
advisory – NextcloudBroken Link;Exploit;Vendor Advisory
-
https://hackerone.com/reports/590319
HackerOneExploit;Third Party Advisory
-
https://security.gentoo.org/glsa/202009-09
Nextcloud Desktop Sync client: Multiple vulnerabilities (GLSA 202009-09) — Gentoo securityThird Party Advisory
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