CVE-2023-28835 LOW

CVE-2023-28835: Insecure randomness for default password in nextcloud

Vendor Nextcloud
Product security-advisories
Weakness CWE-338
Published March 30, 2023
Last update February 11, 2025

CVSS base score

3.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker willing to brute force it. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. This issue only affects users who do not have a password policy enabled, so enabling a password policy is an effective mitigation for users unable to upgrade.

Key dates

02Disclosure timeline

March 30, 2023 CVE published
February 11, 2025 Record updated