CVE-2023-32320: Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform

High severity · published Jun 22, 2023

CVE-2023-32320

Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform

7.5

CVSS

0.9%

EPSS

On KEV

Description

Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform. When multiple requests are sent in parallel, all of them were executed even if the amount of faulty requests succeeded the limit by the time the response was sent to the client. This allowed someone to send as many requests the server could handle in parallel to bruteforce protected details instead of the configured limit, default 8. Nextcloud Server versions 25.0.7 and 26.0.2 and Nextcloud Enterprise Server versions 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7 and 26.0.2 contain patches for this issue.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

None

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.9% · higher than 59% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Nextcloud Server · Nextcloud

21.0.0 before 21.0.9.12; 22.0.0 before 22.2.10.12; 23.0.0 before 23.0.12.7; 24.0.0 before 24.0.12.2; 25.0.0 before 25.0.7; 25.0.0 before 25.0.7; +2 more · source: NVD

Affected product

Nextcloud Server

Nextcloud

All Nextcloud Server CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-32320

CVE.org

https://www.cve.org/CVERecord?id=CVE-2023-32320

Patch

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qphh-6xh7-vffg

Patch

https://github.com/nextcloud/server/pull/38274

Permissions Required

https://hackerone.com/reports/1918525