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CVE-2020-8223

Good to know:

Date: October 5, 2020

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.

Language: PHP

Severity Score

6.5

Related Resources (6)

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/

Url: https://nextcloud.com/security/advisory/?id=NC-SA-2020-029

Url: https://nvd.nist.gov/vuln/detail/CVE-2020-8223

Url: https://hackerone.com/reports/889243

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T7FX3O6SJE2S52I2HAA4DSTUIISP5BNA/

Url: https://www.mend.io/vulnerability-database/CVE-2020-8223

Severity Score

6.5

Weakness Type (CWE)

Improper Privilege Management

CWE-269

Top Fix

Upgrade Version

Upgrade to version 17.0.8, 18.0.7, 19.0.1

CVSS v3.1

Base Score:	6.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	REQUIRED
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	HIGH
Availability (A):	NONE

CVSS v2

Base Score:	3.5
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	SINGLE
Confidentiality (C):	NONE
Integrity (I):	PARTIAL
Availability (A):	NONE
Additional information:

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