Medium severity · published Mar 20, 2020
CVE-2020-8138
A missing check for IPv4 nested inside IPv6 in Nextcloud server < 17.0.1, < 16.0.7, and < 15.0.14 allowed a Server-Side Request Forgery (SSRF) vulnerability when subscribing to a…
6.5
CVSS
1.4%
EPSS
No
On KEV
Description
A missing check for IPv4 nested inside IPv6 in Nextcloud server < 17.0.1, < 16.0.7, and < 15.0.14 allowed a Server-Side Request Forgery (SSRF) vulnerability when subscribing to a malicious calendar URL.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 15.0.14; 16.0.0 before 16.0.7; 17.0.0 before 17.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8138
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8138
Exploit
https://hackerone.com/reports/736867
Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-014
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