CVE-2023-25818

Missing brute force protection on password reset token in Nextcloud Server

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.31%
Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v243-x6jc-42mp vendor advisory
https://github.com/nextcloud/server/pull/36489 issue tracking
https://github.com/nextcloud/server/pull/36489/commits/704eb3aa6cecc0a646f5cca4290b595f493f9ed3 patch

Frequently Asked Questions

What is the severity of CVE-2023-25818?
CVE-2023-25818 has been scored as a medium severity vulnerability.
How to fix CVE-2023-25818?
To fix CVE-2023-25818, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-25818 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-25818 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-25818?
CVE-2023-25818 affects nextcloud security-advisories.
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