CVE-2023-25818

Missing brute force protection on password reset token in Nextcloud Server

CVSS 5.3 MEDIUMEPSS 0.6%CWE-307

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 Mar 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

nextcloud · security-advisories

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v243-x6jc-42mp https://github.com/nextcloud/server/pull/36489 https://github.com/nextcloud/server/pull/36489/commits/704eb3aa6cecc0a646f5cca4290b595f493f9ed3