Medium severity · published Aug 21, 2020
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
6.8
CVSS
25.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)25.8% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
Desktop · Nextcloud
before 2.6.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8227
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8227
Exploit
https://hackerone.com/reports/590319
Broken Link
https://nextcloud.com/security/advisory/?id=NC-SA-2020-032
Third Party Advisory
https://security.gentoo.org/glsa/202009-09
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