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 malicious calendar URL.
SSRF
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
hackeroneCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 44%
VendorProductVersion
nextcloudnextcloud_server
𝑥
< 15.0.14
nextcloudnextcloud_server
16.0.0 ≤
𝑥
< 16.0.7
nextcloudnextcloud_server
17.0.0 ≤
𝑥
< 17.0.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://hackerone.com/reports/736867
https://nextcloud.com/security/advisory/?id=NC-SA-2020-014
https://hackerone.com/reports/736867
https://nextcloud.com/security/advisory/?id=NC-SA-2020-014