CVE-2023-25579: Nextcloud server is a self hosted home cloud product

High severity · published Feb 22, 2023

CVE-2023-25579

Nextcloud server is a self hosted home cloud product

7.5

CVSS

0.5%

EPSS

On KEV

Description

Nextcloud server is a self hosted home cloud product. In affected versions the `OC\Files\Node\Folder::getFullPath()` function was validating and normalizing the string in the wrong order. The function is used in the `newFile()` and `newFolder()` items, which may allow to creation of paths outside of ones own space and overwriting data from other users with crafted paths. This issue has been addressed in versions 25.0.2, 24.0.8, and 23.0.12. Users are advised to upgrade. There are no known workarounds for this issue.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

High

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 43% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Nextcloud Server · Nextcloud

before 23.0.12; 20.0.0 before 20.0.14; 21.0.0 before 21.0.9; 22.2.0 before 22.2.10; 23.0.0 before 23.0.12; 24.0.0 before 24.0.8; +3 more · source: NVD

Affected product

Nextcloud Server

Nextcloud

All Nextcloud Server CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-25579

CVE.org

https://www.cve.org/CVERecord?id=CVE-2023-25579

Vendor Advisory

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-273v-9h7x-p68v

Patch

https://github.com/nextcloud/server/pull/35074