CVE-2023-39963: Nextcloud Server provides data storage for Nextcloud, an open source cloud platform

High severity · published Aug 10, 2023

CVE-2023-39963

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform

7.8

CVSS

0.3%

EPSS

On KEV

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 20.0.0 and prior to versions 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a missing password confirmation allowed an attacker, after successfully stealing a session from a logged in user, to create app passwords for the victim. Nextcloud server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.

CVSS vector

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

Attack vector

Local

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.3% · higher than 19% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Nextcloud Server · Nextcloud

20.0.0 before 20.0.14.15; 21.0.0 before 21.0.9.13; 22.0.0 before 22.2.10.14; 23.0.0 before 23.0.12.9; 24.0.0 before 24.0.12.5; 25.0.0 before 25.0.9; +5 more · source: NVD

Affected product

Nextcloud Server

Nextcloud

All Nextcloud Server CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-39963

CVE.org

https://www.cve.org/CVERecord?id=CVE-2023-39963

Vendor Advisory

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j4qm-5q5x-54m5

Patch

https://github.com/nextcloud/server/pull/39416

Third Party Advisory

https://hackerone.com/reports/2067572