CVE-2023-28835 - CVE House
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Status published Low CVE-2023-28835

Insecure randomness for default password in nextcloud

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

security-advisories
Vulnerable Versions:
< 24.0.10, >= 25.0.0, < 25.0.4

Timeline

Official Publish: March 30th, 2023
Last Modified: February 11th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Weaknesses (CWE)

CWE-338

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.