What is CVE-2020-8138?

CVE-2020-8138 is a medium-severity vulnerability in Nextcloud Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2020-03-20.

How severe is CVE-2020-8138?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SSRF in Nextcloud Server

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.014 (69.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Nextcloud Nextcloud_server
N/a Nextcloud Server — versions Fixed in 17.0.2, 16.0.7, and 15.0.14

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC)
support@hackerone.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2020-8138?: CVE-2020-8138 is a medium-severity vulnerability in Nextcloud Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2020-03-20.
How severe is CVE-2020-8138?: Medium severity. CVSS v3 base score is 6.5 out of 10.