CVE-2020-8138

Public Exploit

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.22%
Third-Party Advisory hackerone.com Third-Party Advisory nextcloud.com
Affected: n/a Nextcloud Server
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/736867 third party advisory exploit
https://nextcloud.com/security/advisory/?id=NC-SA-2020-014 third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-8138?
CVE-2020-8138 has been scored as a medium severity vulnerability.
How to fix CVE-2020-8138?
To fix CVE-2020-8138, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-8138 being actively exploited in the wild?
It is possible that CVE-2020-8138 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-8138?
CVE-2020-8138 affects n/a Nextcloud Server.
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