CVE-2020-8223

MEDIUM 6.5CVE-2020-8223 · Published 05/10/2020 · updated 17/06/2026

In short

CVE-2020-8223 is a MEDIUM (CVSS 6.5) vulnerability affecting nextcloud server (nextcloud).
Chance of exploitation in the next 30 days (EPSS): 1.5%, higher than 73.7% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
nextcloud server nextcloud	`= 19.0.0`	No fix yet

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.

References

hackerone.com/reports/889243 · Exploit
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7FX3O6SJE2S52I2HAA4DSTUIISP5BNA
nextcloud.com/security/advisory · Vendor Advisory

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Package

Affected versions

Patched versions

nextcloud server

nextcloud

= 19.0.0

No fix yet

More vulnerabilities in nextcloud server

See all →