CVE-2020-8138

PoC —

CVSS 3.1

6.5 medium

EPSS

1%p71

Published

Mar 20, 2020 (Mar 20, 2020)

Modified

Jun 17, 2026

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.

Vendors: nextcloud
Products: nextcloud server
Weakness: CWE-918
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (1.4%)

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