Medium severity · published Jul 10, 2020
CVE-2020-8181
A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars
4.3
CVSS
0.8%
EPSS
No
On KEV
Description
A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Contacts · Nextcloud
before 3.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8181
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8181
hackerone.com
https://hackerone.com/reports/808287%2C
Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-024
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