CVE-2018-3762

openSUSE Security Advisory - openSUSE-SU-2018:1924-1

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Nextcloud Server before 12.0.8 and 13.0.3 suffers from improper checks of dropped permissions for incoming shares allowing a user to still request previews for files it should not have access to.

Nextcloud Server en versiones anteriores a la 12.0.8 y la 13.0.3 sufre de comprobaciones incorrectas de permisos abandonados para comparticiones entrantes, lo que permite que un usuario pueda seguir solicitando previsualizaciones de archivos a los que no debería tener acceso.

An update that fixes two vulnerabilities is now available. This update for nextcloud fixes the following issues. Fixed improper authentication on the OAuth2 token endpoint. Fixed improper checks of dropped permissions for incoming shares allowing a user to still request previews for files it should not have access to.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-12-28 CVE Reserved
2018-07-05 CVE Published
2024-08-05 CVE Updated
2025-08-05 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-281: Improper Preservation of Permissions
CWE-284: Improper Access Control

CAPEC

References (2)

URL	Tag	Source
https://hackerone.com/reports/358339	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://nextcloud.com/security/advisory/?id=nc-sa-2018-002	2023-02-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				< 12.0.8 Search vendor "Nextcloud" for product "Nextcloud Server" and version " < 12.0.8"		-		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 13.0.0 < 13.0.3 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 13.0.0 < 13.0.3"		-		Affected