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CVE-2020-8223

MEDIUM
6.5
CVSS Score
Published: October 5, 2020 at 01:16 PM UTC
Updated: June 17, 2026 at 03:26 AM UTC
2 products affected across 2 vendorsFedoraNextcloud/server

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
3233
Nextcloud/server· Nextcloudnextcloud-app
95%
19.0.0
Vendor states this is fixed in 19.0.1 (unaffected)

References (4)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/889243
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7FX3O6SJE2S52I2HAA4DSTUIISP5BNA/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://nextcloud.com/security/advisory/?id=NC-SA-2020-029

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-269

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