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CVE-2023-25818

HIGHCVSS 7.1/10EPSS 0.60%

Last modified

CVE-2023-25818 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.1/10

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

EPSS Probability
0.60%

44.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NextcloudNextcloud Server>= 21.0.0, < 21.0.9.10
NextcloudNextcloud Server>= 22.0.0, < 22.2.10.10
NextcloudNextcloud Server>= 23.0.0, < 23.0.12.5
NextcloudNextcloud Server>= 24.0.0, < 24.0.10
NextcloudNextcloud Server>= 25.0.0, < 25.0.4

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-25818?
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.
How severe is CVE-2023-25818?
CVE-2023-25818 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.
How do I fix CVE-2023-25818?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-25818?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST