Medium severity · published Jan 6, 2021
CVE-2020-8281
A missing file type check in Nextcloud Contacts 3.3.0 allows a malicious user to upload malicious SVG files to perform cross-site scripting (XSS) attacks
5.4
CVSS
0.6%
EPSS
No
On KEV
Description
A missing file type check in Nextcloud Contacts 3.3.0 allows a malicious user to upload malicious SVG files to perform cross-site scripting (XSS) attacks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Contacts · Nextcloud
before 3.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8281
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8281
Exploit
https://hackerone.com/reports/894876
Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-045
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