CVE-2020-8223

Public Exploit

Description

A logic error in Nextcloud Server 19.0.0 caused a privilege escalation allowing malicious users to reshare with higher permissions than they got assigned themselves.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.27%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory nextcloud.com
Affected: n/a Nextcloud Server
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/889243 third party advisory exploit
https://nextcloud.com/security/advisory/?id=NC-SA-2020-029 vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7FX3O6SJE2S52I2HAA4DSTUIISP5BNA/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-8223?
CVE-2020-8223 has been scored as a medium severity vulnerability.
How to fix CVE-2020-8223?
To fix CVE-2020-8223, 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-2020-8223 being actively exploited in the wild?
It is possible that CVE-2020-8223 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-2020-8223?
CVE-2020-8223 affects n/a Nextcloud Server.
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