Data Storage Overflow Vulnerability in Nextcloud Server by Nextcloud
CVE-2020-8293

6.5MEDIUM

Key Information:

Vendor

Nextcloud
Status
Nextcloud Server
Vendor
CVE Published:
26 January 2021

What is CVE-2020-8293?

A flaw in Nextcloud Server prior to versions 20.0.2, 19.0.5, and 18.0.11 allows users to bypass input validation when creating workflow rules. This exploitation results in the ability to store an unlimited amount of data, potentially overwhelming the system and leading to service disruptions. Such conditions can facilitate denial-of-service scenarios, especially during subsequent interactions with the affected rules, adversely affecting overall system performance and user experience.

Affected Version(s)

Nextcloud Server Fixed in 20.0.2, 19.0.5, 18.0.11

References

https://hackerone.com/reports/1018146
x_refsource_MISC
https://nextcloud.com/security/advisory/?id=NC-SA-2021-001
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CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.