What is CVE-2023-25818?

CVE-2023-25818 is a vulnerability in Nextcloud Server, where a malicious user could reset the password of another user and attempt to brute force the password reset token.

What is the severity of CVE-2023-25818?

CVE-2023-25818 has a severity rating of 7.1 (high).

Which versions of Nextcloud Server are affected by CVE-2023-25818?

CVE-2023-25818 affects Nextcloud Server versions 21.0.0 to 21.0.9.10, 22.0.0 to 22.2.10.10, 23.0.0 to 23.0.12.5, 24.0.0 to 24.0.10, and 25.0.0 to 25.0.4.

How can I fix CVE-2023-25818?

To fix CVE-2023-25818, it is recommended to update Nextcloud Server to the latest available version. Make sure to review the official Nextcloud security advisory (link provided) for more detailed instructions.

Is there any additional information about CVE-2023-25818?

Yes, you can find more information about CVE-2023-25818 in the official Nextcloud security advisory (link provided).

Vulnerability/
CVE-2023-25818

high

7.1

CWE

307

27/3/2023

2/8/2024

CVE-2023-25818: Missing brute force protection on password reset token in Nextcloud Server

First published: Mon Mar 27 2023(Updated: )

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.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Nextcloud Nextcloud Server	>=21.0.0<21.0.9.10
Nextcloud Nextcloud Server	>=22.0.0<22.2.10.10
Nextcloud Nextcloud Server	>=23.0.0<23.0.12.5
Nextcloud Nextcloud Server	>=24.0.0<24.0.10
Nextcloud Nextcloud Server	>=24.0.0<24.0.10
Nextcloud Nextcloud Server	>=25.0.0<25.0.4
Nextcloud Nextcloud Server	>=25.0.0<25.0.4

Remedy

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

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is CVE-2023-25818?
CVE-2023-25818 is a vulnerability in Nextcloud Server, where a malicious user could reset the password of another user and attempt to brute force the password reset token.
What is the severity of CVE-2023-25818?
CVE-2023-25818 has a severity rating of 7.1 (high).
Which versions of Nextcloud Server are affected by CVE-2023-25818?
CVE-2023-25818 affects Nextcloud Server versions 21.0.0 to 21.0.9.10, 22.0.0 to 22.2.10.10, 23.0.0 to 23.0.12.5, 24.0.0 to 24.0.10, and 25.0.0 to 25.0.4.
How can I fix CVE-2023-25818?
To fix CVE-2023-25818, it is recommended to update Nextcloud Server to the latest available version. Make sure to review the official Nextcloud security advisory (link provided) for more detailed instructions.
Is there any additional information about CVE-2023-25818?
Yes, you can find more information about CVE-2023-25818 in the official Nextcloud security advisory (link provided).

collector/nvd-index
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/severity
agent/references
agent/weakness
agent/author
agent/title
agent/remedy
agent/last-modified-date
agent/description
agent/first-publish-date
agent/tags
agent/event
vendor/nextcloud
canonical/nextcloud nextcloud server
version/nextcloud nextcloud server/21.0.0
version/nextcloud nextcloud server/22.0.0
version/nextcloud nextcloud server/23.0.0
version/nextcloud nextcloud server/24.0.0
version/nextcloud nextcloud server/25.0.0