CVE-2020-8293

openSUSE Security Advisory - openSUSE-SU-2021:0274-1

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A missing input validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows users to store unlimited data in workflow rules causing load and potential DDoS on later interactions and usage with those rules.

Una falta de comprobación de la entrada en Nextcloud Server versiones anteriores a 20.0.2, 19.0.5, 18.0.11, permite a usuarios almacenar datos ilimitados en reglas de flujo de trabajo que causan una carga y una potencial DDoS en interacciones posteriores y uso con esas reglas

An update that fixes three vulnerabilities is now available. This update for nextcloud fixes the following issues. Fixed a missing link validation. Fixed a denial of service attack. Fixed an input validation issue This update was imported from the openSUSE:Leap:15.2:Update update project.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-28 CVE Reserved
2021-01-26 CVE Published
2024-08-04 CVE Updated
2025-08-04 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (2)

URL	Tag	Source
https://hackerone.com/reports/1018146	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://nextcloud.com/security/advisory/?id=NC-SA-2021-001	2022-09-27

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"				< 18.0.11 Search vendor "Nextcloud" for product "Nextcloud Server" and version " < 18.0.11"		-		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 19.0.0 < 19.0.5 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 19.0.0 < 19.0.5"		-		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				>= 20.0.0 < 20.0.2 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 20.0.0 < 20.0.2"		-		Affected