CVE-2023-25818: Nextcloud server is an open source, personal cloud implementation

High severity · published Mar 27, 2023

CVE-2023-25818

Nextcloud server is an open source, personal cloud implementation

7.1

CVSS

0.6%

EPSS

On KEV

Description

Nextcloud server is an open source, personal cloud implementation. In affected versions a malicious user could try to reset the password of another user and then brute force the 62^21 combinations for the password reset token. As of commit `704eb3aa` password reset attempts are now throttled. Note that 62^21 combinations would significant compute resources to brute force. None the less it is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. There are no known workarounds for this vulnerability.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

Low

Integrity

High

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.6% · higher than 49% 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 21.0.9.10; 22.0.0 before 22.2.10.10; 23.0.0 before 23.0.12.5; 24.0.0 before 24.0.10; 24.0.0 before 24.0.10; 25.0.0 before 25.0.4; +1 more · source: NVD

Affected product

Nextcloud Server

Nextcloud

All Nextcloud Server CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-25818

CVE.org

https://www.cve.org/CVERecord?id=CVE-2023-25818

Vendor Advisory

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v243-x6jc-42mp

Issue Tracking

https://github.com/nextcloud/server/pull/36489

Patch

https://github.com/nextcloud/server/pull/36489/commits/704eb3aa6cecc0a646f5cca4290b595f493f9ed3